backbone-japanese-input-handler-mixin.js Japanese input handler mixin for Backbone.js Usage example BackboneJapaneseInputHandlerMixin.call(Backgrid.Extension.ClientSideFilter.prototype); var filter = new Backgrid.Extension.ClientSideFilter({ collection: pageableTerritories, fields: ['name'] }); Example demo: http://hnakamur.github.io/backgrid-example/complete-example-ja.html source: https://github.com/hnakamur/backgrid-example/