Is Akai Shuuichi Hideyoshi Akai Shuuichi or Hideyoshi?

Akai Shuuichi

Its hiragana is

あかい ひでいち

The rover notes are.

Akai Shuuichi

Postscript (same as postscript); Police sergeant

The three you listed translated "Xiu" and "Yi" into Japanese in Chinese.

Hideyoshi is an inherent Japanese name with a special pronunciation.

Hideki