CJK Input Bridge

IME composition and candidate window in Minecraft

CJK Input Bridge is a mod that makes it easier to enter Japanese and other CJK text in Minecraft 1.12.2 on Windows.

CJK Input Bridgeは1.12.2での日本語系の文字入力を改善します

In Minecraft 1.12.2, text being composed with an IME may not appear correctly in the game, and the candidate window may be displayed far away from the text field.

This mod connects the Windows IME with Minecraft text fields so that composition text and conversion candidates appear near the current input position.

It can be used in a wide range of text-entry screens, including chat boxes, search fields, name fields, and configuration screens added by other mods.

Features

Displays IME composition text directly in Minecraft text fields
Positions the candidate window near the current input location
Keeps the candidate window aligned when long text causes the field to scroll horizontally
Adjusts the candidate window position for different GUI scale settings
Keeps IME input working after switching tabs or text fields within a GUI
Restores IME input after switching away from Minecraft with Alt+Tab
Passes committed text to some modded screens that do not use standard Minecraft text fields

Requirements

Item	Supported environment
Minecraft	1.12.2
Mod loader	Cleanroom Loader
Tested Cleanroom Loader version	0.5.15-alpha
Operating system	Windows 11
Java	Java 25
Tested input language	Japanese

CJK Input Support

At this time, only Japanese input has been tested.

Chinese, Korean, and other CJK input methods have not yet been tested and may not work correctly depending on the IME and system environment.

Input environment	Status
Japanese IME	Tested
Chinese input	Not tested
Korean input	Not tested
Windows 11 x64	Tested
Windows on ARM	Not tested
macOS	Not supported
Linux	Not supported

Installation

Install Minecraft 1.12.2 and Cleanroom Loader.
Download the CJK Input Bridge mod file.
Place the downloaded file in the Minecraft mods folder.
Start Minecraft with the Cleanroom Loader profile.

No additional DLLs, CMake installation, or Visual Studio Build Tools are required.

This mod is designed for Windows only. macOS and Linux implementations are not included.