- Traditional Chinese Character(HanT):
古賀悠太郎
- Simplified Chinese Character(HanS):
古贺悠太郎
- Bopomofo(Mandarin Phonetic Symbols): ㄍㄨˇ ㄏㄜˋ ㄧㄡ ㄊㄞˋ ㄌㄤˊ (ㄍㄏㄧㄊㄌ)
- Bopomofo(Zhuyin Keyboard Input/IME): "ej3ck4u. w94x;6" (ej3ck4u.w94x;6)
- (ASCII) Hanyu Pinyin: "guheyotailang" "Gu3He4Yo1Tai4Lang2" "Gu3 He4 Yo1 Tai4 Lang2" (GHYTL)
- (Latin) Hànyǔ Pīnyīn: GǔHèYōTàiLáng [ Gǔ Hè Yō Tài Láng ]
- (英文翻譯) English Translation: "Yutaro Koga"
- (西語翻譯) Traducción Español: "yutaro koga"
- (日文翻譯) 日本語翻訳: "古賀悠太郎"