diff --git a/README.md b/README.md
index 0eb326f..081984c 100644
--- a/README.md
+++ b/README.md
@@ -44,7 +44,7 @@ class Dst(
 ### Set alias on map
 #### for getter
 ```kotlin
-class Src(@get:PropertyAlias("aliased") val str: String)
+class Src(@KGetterAlias("aliased") val str: String)
 
 class Dst(val aliased: String)
 ```
@@ -53,7 +53,7 @@ class Dst(val aliased: String)
 ```kotlin
 class Src(val str: String)
 
-class Dst(@param:PropertyAlias("str") private val _src: String) {
+class Dst(@param:KPropertyAlias("str") private val _src: String) {
   val src = _src.someArrangement
 }
 ```
@@ -64,7 +64,7 @@ val srcMap = mapOf("snake_case" to "SnakeCase")
 
 class Dst(val snakeCase: String)
 
-val dst: Dst = Mapper(DataClass::class.primaryConstructor!!) { it.toSnakeCase }.map(src)
+val dst: Dst = Mapper(::DataClass) { it.toSnakeCase }.map(src)
 ```
 
 ### Map param to another class
@@ -72,7 +72,7 @@ val dst: Dst = Mapper(DataClass::class.primaryConstructor!!) { it.toSnakeCase }.
 ```kotlin
 class CreatorClass @SingleArgCreator constructor(val arg: String) {
   companion object {
-    @SingleArgCreator
+    @KConverter
     fun fromInt(arg: Int): CreatorClass {
       return CreatorClass(arg.toString)
     }
diff --git a/src/main/kotlin/com/wrongwrong/mapk/annotations/KGetterAlias.kt b/src/main/kotlin/com/wrongwrong/mapk/annotations/KGetterAlias.kt
new file mode 100644
index 0000000..6bf6815
--- /dev/null
+++ b/src/main/kotlin/com/wrongwrong/mapk/annotations/KGetterAlias.kt
@@ -0,0 +1,5 @@
+package com.wrongwrong.mapk.annotations
+
+@Target(AnnotationTarget.PROPERTY)
+@Retention(AnnotationRetention.RUNTIME)
+annotation class KGetterAlias(val value: String)
diff --git a/src/main/kotlin/com/wrongwrong/mapk/annotations/KPropertyAlias.kt b/src/main/kotlin/com/wrongwrong/mapk/annotations/KPropertyAlias.kt
index 5ada366..eab10fa 100644
--- a/src/main/kotlin/com/wrongwrong/mapk/annotations/KPropertyAlias.kt
+++ b/src/main/kotlin/com/wrongwrong/mapk/annotations/KPropertyAlias.kt
@@ -1,5 +1,5 @@
 package com.wrongwrong.mapk.annotations
 
-@Target(AnnotationTarget.VALUE_PARAMETER, AnnotationTarget.PROPERTY_GETTER)
+@Target(AnnotationTarget.VALUE_PARAMETER)
 @Retention(AnnotationRetention.RUNTIME)
 annotation class KPropertyAlias(val value: String)
diff --git a/src/main/kotlin/com/wrongwrong/mapk/core/KFunctionForCall.kt b/src/main/kotlin/com/wrongwrong/mapk/core/KFunctionForCall.kt
new file mode 100644
index 0000000..97fdab6
--- /dev/null
+++ b/src/main/kotlin/com/wrongwrong/mapk/core/KFunctionForCall.kt
@@ -0,0 +1,25 @@
+package com.wrongwrong.mapk.core
+
+import kotlin.reflect.KFunction
+import kotlin.reflect.KParameter
+import kotlin.reflect.jvm.isAccessible
+
+class KFunctionForCall<T>(private val function: KFunction<T>, instance: Any? = null) {
+    val parameters: List<KParameter> = function.parameters
+    private val originalArray: Array<Any?>
+    val argumentArray: Array<Any?> get() = originalArray.copyOf()
+
+    init {
+        // この関数には確実にアクセスするためアクセシビリティ書き換え
+        function.isAccessible = true
+        originalArray = if (instance != null) {
+            Array(parameters.size) { if (it == 0) instance else null }
+        } else {
+            Array(parameters.size) { null }
+        }
+    }
+
+    fun call(arguments: Array<Any?>): T {
+        return function.call(*arguments)
+    }
+}
diff --git a/src/main/kotlin/com/wrongwrong/mapk/core/KMapper.kt b/src/main/kotlin/com/wrongwrong/mapk/core/KMapper.kt
index 1083db6..9a1934c 100644
--- a/src/main/kotlin/com/wrongwrong/mapk/core/KMapper.kt
+++ b/src/main/kotlin/com/wrongwrong/mapk/core/KMapper.kt
@@ -1,132 +1,122 @@
 package com.wrongwrong.mapk.core
 
 import com.wrongwrong.mapk.annotations.KConstructor
+import com.wrongwrong.mapk.annotations.KGetterAlias
 import com.wrongwrong.mapk.annotations.KPropertyAlias
 import com.wrongwrong.mapk.annotations.KPropertyIgnore
+import java.lang.reflect.Method
 import kotlin.reflect.KClass
 import kotlin.reflect.KFunction
-import kotlin.reflect.KProperty1
+import kotlin.reflect.KParameter
 import kotlin.reflect.KVisibility
 import kotlin.reflect.full.companionObjectInstance
+import kotlin.reflect.full.findAnnotation
 import kotlin.reflect.full.functions
 import kotlin.reflect.full.isSuperclassOf
 import kotlin.reflect.full.memberProperties
 import kotlin.reflect.full.primaryConstructor
-import kotlin.reflect.jvm.isAccessible
+import kotlin.reflect.jvm.javaGetter
+
+class KMapper<T : Any> private constructor(
+    private val function: KFunctionForCall<T>,
+    propertyNameConverter: (String) -> String = { it }
+) {
+    constructor(function: KFunction<T>, propertyNameConverter: (String) -> String = { it }) : this(
+        KFunctionForCall(function), propertyNameConverter
+    )
 
-class KMapper<T : Any>(private val function: KFunction<T>, propertyNameConverter: (String) -> String = { it }) {
     constructor(clazz: KClass<T>, propertyNameConverter: (String) -> String = { it }) : this(
         getTarget(clazz), propertyNameConverter
     )
 
-    private val parameters: Set<ParameterForMap<*>> = function.parameters
-        .map { ParameterForMap.newInstance(it, propertyNameConverter) }
-        .toSet()
+    private val parameterMap: Map<String, ParameterForMap<*>> = function.parameters
+        .filter { it.kind != KParameter.Kind.INSTANCE }
+        .associate {
+            (it.findAnnotation<KPropertyAlias>()?.value ?: propertyNameConverter(it.name!!)) to
+                    ParameterForMap.newInstance(it)
+        }
 
     init {
-        if (parameters.isEmpty()) throw IllegalArgumentException("This function is not require arguments.")
-
-        // private関数に対してもマッピングできなければ何かと不都合があるため、accessibleは書き換える
-        function.isAccessible = true
+        if (parameterMap.isEmpty()) throw IllegalArgumentException("This function is not require arguments.")
     }
 
-    fun map(srcMap: Map<String, Any?>): T {
-        return parameters.associate {
-            // 取得した内容がnullでなければ適切にmapする
-            it.param to srcMap.getValue(it.name)?.let { value ->
-                mapObject(it, value)
+    private fun bindParameters(targetArray: Array<Any?>, src: Any) {
+        src::class.memberProperties.forEach { property ->
+            val javaGetter: Method? = property.javaGetter
+            if (javaGetter != null && property.visibility == KVisibility.PUBLIC && property.annotations.none { annotation -> annotation is KPropertyIgnore }) {
+                parameterMap[property.findAnnotation<KGetterAlias>()?.value ?: property.name]?.let {
+                    // javaGetterを呼び出す方が高速
+                    javaGetter.isAccessible = true
+                    targetArray[it.index] = javaGetter.invoke(src)?.let { value -> mapObject(it, value) }
+                }
             }
-        }.let { function.callBy(it) }
+        }
     }
 
-    fun map(srcPair: Pair<String, Any?>): T = parameters
-        .single { it.name == srcPair.first }
-        .let {
-            function.callBy(mapOf(it.param to srcPair.second?.let { value -> mapObject(it, value) }))
+    private fun bindParameters(targetArray: Array<Any?>, src: Map<*, *>) {
+        src.forEach { (key, value) ->
+            parameterMap[key]?.let { param ->
+                // 取得した内容がnullでなければ適切にmapする
+                targetArray[param.index] = value?.let { mapObject(param, it) }
+            }
         }
+    }
 
-    fun map(src: Any): T {
-        val srcMap: Map<String, KProperty1.Getter<*, *>> =
-            src::class.memberProperties.filterTargets().associate { property ->
-                val getter = property.getAccessibleGetter()
+    private fun bindParameters(targetArray: Array<Any?>, srcPair: Pair<*, *>) {
+        parameterMap.getValue(srcPair.first.toString()).let {
+            targetArray[it.index] = srcPair.second?.let { value -> mapObject(it, value) }
+        }
+    }
 
-                val key = getter.annotations
-                    .find { it is KPropertyAlias }
-                    ?.let { (it as KPropertyAlias).value }
-                    ?: property.name
+    fun map(srcMap: Map<String, Any?>): T {
+        val array: Array<Any?> = function.argumentArray
+        bindParameters(array, srcMap)
+        return function.call(array)
+    }
 
-                key to getter
-            }
+    fun map(srcPair: Pair<String, Any?>): T {
+        val array: Array<Any?> = function.argumentArray
+        bindParameters(array, srcPair)
+        return function.call(array)
+    }
 
-        return parameters.associate {
-            // 取得した内容がnullでなければ適切にmapする
-            it.param to srcMap.getValue(it.name).call(src)?.let { value ->
-                mapObject(it, value)
-            }
-        }.let { function.callBy(it) }
+    fun map(src: Any): T {
+        val array: Array<Any?> = function.argumentArray
+        bindParameters(array, src)
+        return function.call(array)
     }
 
     fun map(vararg args: Any): T {
-        val srcMap: Map<String, () -> Any?> = listOf(*args)
-            .map { arg ->
-                when (arg) {
-                    is Map<*, *> -> arg.entries.associate { (key, value) ->
-                        (key as String) to { value }
-                    }
-                    is Pair<*, *> -> mapOf(arg.first as String to { arg.second })
-                    else -> {
-                        arg::class.memberProperties.filterTargets().associate { property ->
-                            val getter = property.getAccessibleGetter()
-
-                            val key = getter.annotations
-                                .find { it is KPropertyAlias }
-                                ?.let { (it as KPropertyAlias).value }
-                                ?: property.name
-
-                            key to { getter.call(arg) }
-                        }
-                    }
-                }
-            }.reduce { acc, map ->
-                acc + map
-            }
+        val array: Array<Any?> = function.argumentArray
 
-        return parameters.associate {
-            // 取得した内容がnullでなければ適切にmapする
-            it.param to srcMap.getValue(it.name)()?.let { value ->
-                mapObject(it, value)
+        listOf(*args).forEach { arg ->
+            when (arg) {
+                is Map<*, *> -> bindParameters(array, arg)
+                is Pair<*, *> -> bindParameters(array, arg)
+                else -> bindParameters(array, arg)
             }
-        }.let { function.callBy(it) }
-    }
-}
+        }
 
-private fun Collection<KProperty1<*, *>>.filterTargets(): Collection<KProperty1<*, *>> {
-    return filter {
-        it.visibility == KVisibility.PUBLIC && it.annotations.none { annotation -> annotation is KPropertyIgnore }
+        return function.call(array)
     }
 }
 
-private fun KProperty1<*, *>.getAccessibleGetter(): KProperty1.Getter<*, *> {
-    // アクセス制限の有るクラスではpublicなプロパティでもゲッターにアクセスできない場合が有るため、アクセス可能にして使う
-    getter.isAccessible = true
-    return getter
-}
-
 @Suppress("UNCHECKED_CAST")
-internal fun <T : Any> getTarget(clazz: KClass<T>): KFunction<T> {
-    val factoryConstructor: List<KFunction<T>> =
+internal fun <T : Any> getTarget(clazz: KClass<T>): KFunctionForCall<T> {
+    val factoryConstructor: List<KFunctionForCall<T>> =
         clazz.companionObjectInstance?.let { companionObject ->
             companionObject::class.functions
                 .filter { it.annotations.any { annotation -> annotation is KConstructor } }
-                .map { KFunctionWithInstance(it, companionObject) as KFunction<T> }
+                .map { KFunctionForCall(it, companionObject) as KFunctionForCall<T> }
         } ?: emptyList()
 
-    val constructors: List<KFunction<T>> = factoryConstructor + clazz.constructors
+    val constructors: List<KFunctionForCall<T>> = factoryConstructor + clazz.constructors
         .filter { it.annotations.any { annotation -> annotation is KConstructor } }
+        .map { KFunctionForCall(it) }
 
     if (constructors.size == 1) return constructors.single()
 
-    if (constructors.isEmpty()) return clazz.primaryConstructor!!
+    if (constructors.isEmpty()) return KFunctionForCall(clazz.primaryConstructor!!)
 
     throw IllegalArgumentException("Find multiple target.")
 }
diff --git a/src/main/kotlin/com/wrongwrong/mapk/core/ParameterForMap.kt b/src/main/kotlin/com/wrongwrong/mapk/core/ParameterForMap.kt
index 8df3d96..4f3d0b3 100644
--- a/src/main/kotlin/com/wrongwrong/mapk/core/ParameterForMap.kt
+++ b/src/main/kotlin/com/wrongwrong/mapk/core/ParameterForMap.kt
@@ -1,7 +1,6 @@
 package com.wrongwrong.mapk.core
 
 import com.wrongwrong.mapk.annotations.KConverter
-import com.wrongwrong.mapk.annotations.KPropertyAlias
 import kotlin.reflect.KClass
 import kotlin.reflect.KFunction
 import kotlin.reflect.KParameter
@@ -11,16 +10,7 @@ import kotlin.reflect.full.isSubclassOf
 import kotlin.reflect.full.staticFunctions
 import kotlin.reflect.jvm.isAccessible
 
-internal class ParameterForMap<T : Any> private constructor(
-    val param: KParameter,
-    val clazz: KClass<T>,
-    propertyNameConverter: (String) -> String
-) {
-    val name: String = param.annotations
-        .find { it is KPropertyAlias }
-        ?.let { (it as KPropertyAlias).value }
-        ?: propertyNameConverter(param.name!!)
-
+internal class ParameterForMap<T : Any> private constructor(val index: Int, val clazz: KClass<T>) {
     val javaClazz: Class<T> by lazy {
         clazz.java
     }
@@ -34,8 +24,8 @@ internal class ParameterForMap<T : Any> private constructor(
         creators.find { (key, _) -> input.isSubclassOf(key) }?.second
 
     companion object {
-        fun newInstance(param: KParameter, propertyNameConverter: (String) -> String): ParameterForMap<*> {
-            return ParameterForMap(param, param.type.classifier as KClass<*>, propertyNameConverter)
+        fun newInstance(param: KParameter): ParameterForMap<*> {
+            return ParameterForMap(param.index, param.type.classifier as KClass<*>)
         }
     }
 }
diff --git a/src/test/kotlin/mapk/core/GetTargetTest.kt b/src/test/kotlin/mapk/core/GetTargetTest.kt
index 7214d5e..54057a0 100644
--- a/src/test/kotlin/mapk/core/GetTargetTest.kt
+++ b/src/test/kotlin/mapk/core/GetTargetTest.kt
@@ -3,8 +3,12 @@
 package mapk.core
 
 import com.wrongwrong.mapk.annotations.KConstructor
+import com.wrongwrong.mapk.core.KFunctionForCall
 import com.wrongwrong.mapk.core.getTarget
+import kotlin.reflect.KFunction
+import kotlin.reflect.full.memberProperties
 import kotlin.reflect.full.primaryConstructor
+import kotlin.reflect.jvm.isAccessible
 import org.junit.jupiter.api.Assertions.assertEquals
 import org.junit.jupiter.api.Assertions.assertTrue
 import org.junit.jupiter.api.DisplayName
@@ -27,26 +31,34 @@ class MultipleConstructorDst @KConstructor constructor(val argument: Int) {
     @KConstructor constructor(argument: String) : this(argument.toInt())
 }
 
+@Suppress("UNCHECKED_CAST")
 @DisplayName("クラスからのコンストラクタ抽出関連テスト")
 class GetTargetTest {
+    private fun <T : Any> KFunctionForCall<T>.getTargetFunction(): KFunction<T> {
+        return this::class.memberProperties.first { it.name == "function" }.getter.let {
+            it.isAccessible = true
+            it.call(this) as KFunction<T>
+        }
+    }
+
     @Test
     @DisplayName("セカンダリコンストラクタからの取得テスト")
     fun testGetFromSecondaryConstructor() {
-        val function = getTarget(SecondaryConstructorDst::class)
+        val function = getTarget(SecondaryConstructorDst::class).getTargetFunction()
         assertTrue(function.annotations.any { it is KConstructor })
     }
 
     @Test
     @DisplayName("ファクトリーメソッドからの取得テスト")
     fun testGetFromFactoryMethod() {
-        val function = getTarget(CompanionFactoryDst::class)
+        val function = getTarget(SecondaryConstructorDst::class).getTargetFunction()
         assertTrue(function.annotations.any { it is KConstructor })
     }
 
     @Test
     @DisplayName("無指定でプライマリコンストラクタからの取得テスト")
     fun testGetFromPrimaryConstructor() {
-        val function = getTarget(ConstructorDst::class)
+        val function = getTarget(ConstructorDst::class).getTargetFunction()
         assertEquals(ConstructorDst::class.primaryConstructor, function)
     }
 
diff --git a/src/test/kotlin/mapk/core/ParamAliasTest.kt b/src/test/kotlin/mapk/core/ParamAliasTest.kt
new file mode 100644
index 0000000..3929b90
--- /dev/null
+++ b/src/test/kotlin/mapk/core/ParamAliasTest.kt
@@ -0,0 +1,47 @@
+package mapk.core
+
+import com.wrongwrong.mapk.annotations.KGetterAlias
+import com.wrongwrong.mapk.annotations.KPropertyAlias
+import com.wrongwrong.mapk.core.KMapper
+import org.junit.jupiter.api.Assertions.assertEquals
+import org.junit.jupiter.api.DisplayName
+import org.junit.jupiter.api.Test
+
+private data class AliasedDst(
+    val arg1: Double,
+    @param:KPropertyAlias("arg3") val arg2: Int
+)
+
+private data class AliasedSrc(
+    @KGetterAlias("arg1")
+    val arg2: Double,
+    val arg3: Int
+)
+
+@DisplayName("エイリアスを貼った場合のテスト")
+class ParamAliasTest {
+    @Test
+    @DisplayName("パラメータにエイリアスを貼った場合")
+    fun paramAliasTest() {
+        val src = mapOf(
+            "arg1" to 1.0,
+            "arg2" to "2",
+            "arg3" to 3
+        )
+
+        val result = KMapper(::AliasedDst).map(src)
+
+        assertEquals(1.0, result.arg1)
+        assertEquals(3, result.arg2)
+    }
+
+    @Test
+    @DisplayName("ゲッターにエイリアスを貼った場合")
+    fun getAliasTest() {
+        val src = AliasedSrc(1.0, 2)
+        val result = KMapper(::AliasedDst).map(src)
+
+        assertEquals(1.0, result.arg1)
+        assertEquals(2, result.arg2)
+    }
+}
diff --git a/src/test/kotlin/mapk/core/SimpleKMapperTest.kt b/src/test/kotlin/mapk/core/SimpleKMapperTest.kt
index d63caa3..d90be59 100644
--- a/src/test/kotlin/mapk/core/SimpleKMapperTest.kt
+++ b/src/test/kotlin/mapk/core/SimpleKMapperTest.kt
@@ -6,7 +6,6 @@ import com.wrongwrong.mapk.annotations.KConstructor
 import com.wrongwrong.mapk.core.KMapper
 import java.math.BigInteger
 import kotlin.reflect.full.isSubclassOf
-import kotlin.reflect.full.primaryConstructor
 import org.junit.jupiter.api.Assertions.assertEquals
 import org.junit.jupiter.api.DisplayName
 import org.junit.jupiter.api.Nested
@@ -71,7 +70,7 @@ class SimpleKMapperTest {
 
     private val mappers: Set<KMapper<out SimpleDst>> = setOf(
         KMapper(SimpleDst::class),
-        KMapper(SimpleDst::class.primaryConstructor!!),
+        KMapper(::SimpleDst),
         KMapper((SimpleDst)::factory),
         KMapper(this::instanceFunction),
         KMapper(SimpleDstExt::class)