Translation

kin'ikoushi means "Japanese Bush Warbler" in English.

kin'ikoushi written with kanji is 金衣公子.
These are jouyou kanji 常用漢字, taught in the fourth year of shougakkou 小学校.
kin'ikoushi written with katakana is キンイコウシ.
kin'ikoushi written with hiragana is きんいこうし.
Romaji ki n i ko u shi
Hiragana
Katakana
Kanji
Meaning Gold Garment Young Nobleman
School Level 小1 小4 小2 小1

Further Reading

Wikipedia: (Japanese_bush_warbler)