Welcome!
You’re aware the note names are all different in Japanese, yes? They’re named in katakana, using the old Iroha order – it’s a slightly archaic version of “alphabetical” order in Japanese, which takes its name from the start of a poem which uses each hiragana character exactly once, except for ん, which didn’t exist back then. (Well, actually, it uses each man’yogana character exactly once, but since man’yogana is the precursor to hiragana…)
So instead of A, B, C, the musical notes are イ, ロ, ハ, ニ, ホ, ヘ, ト