Kōji Iwasawa

Kōji Iwasawa is one of those artists whose name is less famous than his voice. Born in 1976 in Isogo, Yokohama, he is a singer-songwriter and guitarist, and to most Japanese listeners he is instantly recognizable as the lower, steadier half of the duo Yuzu. What strikes me about him is how little of the usual celebrity apparatus surrounds him. Look at the record we have: blood type, schooling, family, agency — nearly all of it simply isn't public. There is no carefully managed social feed doing the heavy lifting. For a musician of his standing in Japan, that is unusual, and I think it's deliberate. He has built a career where the songs, not the personality, carry the weight. English-speaking readers who know Japanese pop mostly through idol machinery may find this a useful corrective: there is a whole tier of Japanese artists who became household names by writing and singing well for twenty-plus years and then going home. Iwasawa belongs to it, and the thinness of his public file is, oddly, the most telling fact about him.

Name (English)

Kōji Iwasawa

Name (Japanese)

岩沢厚治

Reading

いわさわ こうじ

Born

October 14, 1976 (age 49)

Zodiac / Chinese zodiac

Libra / Dragon

Origin

Isogo-ku, Kanagawa Prefecture, Japan

Occupation

singer-songwriter / singer / guitarist

• Wikipedia (Japanese)https://ja.wikipedia.org/wiki/%E5%B2%A9%E6%B2%A2%E5%8E%9A%E6%B2%BB
• Wikidatahttps://www.wikidata.org/wiki/Q11475275

Tags

• Kanagawa Prefecture
• singer-songwriter
• singer
• guitarist

Last updated

2026-08-07

Facts are limited to publicly available information up to 2024; non-public or unconfirmed items are omitted. English text is machine-assisted (facts translated by Sonnet, "My Take" written by Opus 4.8). The Japanese page is the source of record.