Gojūon OTG - A Japanese alphab

A Gojūon(Japanese alphabet, Gojuon) learning app.

Training included are as below:
Rōmaji < - > Hiragana
Hiragana < - > Rōmaji
Rōmaji < - > Katakana
Katakana < - > Rōmaji
Hiragana < - > Katakana
Katakana < - > Hiragana