This app is for inputting Kanji, word prediction and spelling error check for Japanese within B16x2 Keyboard.
After installing, open it and you can see its description. According to it, you can connect the Prediction to B16x2 Keyboard.
From B16x2 Keyboard, you can see the future keyboard you can type fast in a consistent way anywhere from mobile to desktop.
ref.) This app was created based on Kanji DB extracted from SKK and KAKASI dictionary under GNU GPL, and Kana word DB extracted from GitHub/hermitdave/FrequencyWords under MIT license as below:
MIT License
Copyright (c) 2016 Hermit Dave