"The password is one-hundred and twenty five in numbers"
γγΉγ― the password
γ²γγ 100
γ«γγ γ 20
γ 5
γζ°εγ§ in numbers
Are you familiar with numberο½ in Japanese? Anyway, it is a bγt tricky as they are trying to tell you the password without actually telling you, for whatever reason. I don't know why they don't just put "125" instead of γ²γγγ«γγ γγ
I know that δΈηΎδΊεδΊ is 125, but i don't know that it's written in a mixture of hiragana & katakana. I think it's done so that only Japanese speakers can download the file (in order to reduce the traffic to this website).
From experience that's likely to be 125 ('direct input' or half-size ascii) not οΌοΌοΌ (full size ascii). They aren't expecting ηΎδΊεδΊ as the entry.