Avan started playing electric bass when he was in high school ; he organized a rock band and played at a live house in Fukuoka- City, he began to study wood bass under Fumio Tashiro and Hajime Niwa.He’s a song writer, too, for instance, he composed "Blue Star," as a duo name with Takashi Kudo, a pro jazz pianist, and "Free Dub", and "A Boy and the Crescent Moon," which were included on the pro jazz guitarist Satoru Uchiyama's second album. His works are unconventional.He’s currently in bands "Avan Quartette", "Avan Trio", "Trio D.N.A," and "How Happy, the last of which is his regular group. He also plays on rock and jazz of various genres. In 2013, he held his first vocal live show at the Jazz Inn New Combo in Fukuoka- City.

Tomoyuki Hirata started playing acoustic guitar when he was in junior high school. He listened to Bob Dylan, Eric Clapton and Yutaka Ozaki, and began to play in an HR/HM, R&B and funk band with electric guitars. A CD by his band was released by HMV and Tower Records nationwide. He started further band activities and worked as a supporting artist on live or recording work. Now he plays in Rue de Valse around the whole country and teaches at a music school. His guitar technique is widely renowned among musicians.

Takako Uemura was born in Kitakyushu, Fukuoka. She started playing the organ at four years old and the electronic organ at six. In junior high school, she was in the brass band and played clarinet to enhance her musical abilities, such as her musical sense. She developed her flexible musicality, including interests in classical, pop, rock, and jazz, at that time. After graduation from junior college, she worked as a music teacher and played the electronic organ at a lot of events. It earned her a good reputation. She played for professional bands when she was about 30 years old. She’s now a member of the Delicious Four, Takami Asano's TAGC-Fukuoka (with the guitarist Godiego). She’s also played with a lot of musicians who are famous nationwide. She’s working hard with a broad range of musicians. She sometimes plays gently and sensitively, and sometimes emotionally; her style is very popular. Her perfect pitch and handle of any situation led to her being trusted by various kinds of musician.

Hieaki Miyayoshi was born in 1972 in Kitakyushu, Fukuoka, and he was brought up surrounded by music. He started playing piano at six years old and, drums at eight. In high school, he was in the brass band and played various kinds of music, including classical, popular music, and jazz. In college, he built on the foundation of his earlier instrumental playing by studying and researching for jazz and, popular music on his own. At the same time he started teaching drums in music school and performing in various places. Now he’s a full-time lecturer on, drums and a performers of various kinds of music on piano and drums.On the keyboards, he performs with lots of different professional singers at a local live bar in Kitakyushu, with the Gospel Choir in Fukuoka, and with national constituency musicians. He gets good reviews. On the drums, he performs various kinds of music, specifically jazz, popular music, and rock, in various locations in Kyushu. He appears with a broad range of musicians. Recently offers of support in Fukuoka for the Kitakyushu Gospel Choir have greatly increased. His work is respected for being on the cutting edge and most difficult forefront of gospel music.He’s played with a lot of musicians who are famous nationwide, such as Tetsuo Sakurai (bassist), Akiko (jazz singer), Rie Akagi (flute player), and Takami Asano (guitarist for:Godiego)., His communication ability, his ability to respond promptly while performing, and the sounds that he makes have earned him an excellent reputation.