【Asa & Harumi Duo】
■Violinist Asa Nakajima Official Website
【association and publisher】
■JAPAN FEDERATION OF GUITARISTS（full membership）
■Guitar Ensemble Association Of Japan（executive director）
■Japan Guitarists Association
■Japan Guitar Association
■Japan Spain Guitar Association（executive board member）
■Japan Guitar Education for Junior Association（executive board member）
■All Japan Guitar Association（jury）
■Gendai Guitar Co., Ltd.（monthly columnist of Gendai Guitar magazine）
■HOMA dream Inc. (interviewee on Guitar Dream Magazine Oct.2009)
■Guitar friend magazine（ a regular feature"How about this guitar score ?! from Harumi Nakajima")
■Iizuna Musica Festa in Nagano (instructor and hold concert with Asa Nakajima)
Let's enjoy music camp in Nagano!
【guitar and music shops】
■Andante -Guitar Work Shop（Ochanomizu)
■Casa de la Guitarra.S.A. （Meziro)
-Classical guitars and early music instruments
■Classical Guitar shop Media Calm（Ochanomizu)
■Yamano Music.co.,Ltd.（Ginza)
■Kurosawa music（Shin-Ohkubo)
■G＆M（NishiーOgikubo)
■Plaza Guitarra（Kaname-cho)
■Guitar shop AURA
■Kwai Omotesando
■Yamaha music Ginza
■Classical guitar shop FANA（Minami-ikebukuro）
■Guitar shop Charis（Ebisu)
【conservatory, guitarists and composer】
■Music Concervatory of Wastchester N.Y.
■guitarist Shin-ichi Fukuda Official Website
■guitarist Roland Dyens
■guitarist Andrew York
■guitarist William Kanengiser
■Los Angels Guitar Quartet
■Shibata & Fukuyama guitar duo Official Website
■guitarist Shigeru Yamazaki in Kobe Official Website
■composer guitarist Shingo Fujii in Kyoto Official Blog
■ music theory , Composer Yoko Nakamura Official Blog
【Tokyo Guitar Ensemble】
■Tokyo Guitar Ensemble＝TGE
■Composer guitarist, TGEM member Dan Cosley Official Website
■representativ of Tokyo Guitar Ensembre member
Kazuhisa Okamoto's blog
Kazuhisa Okamoto's Ofiicial Website
■Tokyo Guitar Ensembre & M member Noriyuki Awato
ASA INTERNATIONAL LTD.