Meguro Eki Higashi-guchi Bldg. 3F 3-1-5 Kami-Ohsaki, Shinagawa-ku, Tokyo 141 JAPAN TEL: 03-3447-3615
ASG: S&W M10, M19, M16 series, Remington M700 BDL, Colt Python, Colt Gov. series, Mini UZI, SIG P220, etc. REP: Colt S.A.A., S&W M19, M36, Colt Python, etc.
KSC Corp
1616 Ooshimojo, Shikishima-cho, Nakakoma-gun, Yamanashi-ken 400-01
JAPAN TEL: 0552-77-2365
ASG: Beretta M93R REP: Beretta M93R, Colt King Cobra
Marui (Tokyo Marui) 
5-17-1 Ayase, Adachi-ku, Tokyo 120
JAPAN TEL: 03-3605-3312
ASG: H&K MP-5 series, FA-MAS, M16A1 and variants, H&K G3, H&K PSG-1, AK-47 and
variants, Styer AUG, SIG SG550, H&K MP5 PDW, G3 MC51, etc.SIG/SAUER P.228, etc. (Note:
Marui's electric guns are dominant in battle games) Styer AUG, SIG SG550, H&K MP5 PDW,
G3 MC51, etc.
Marushin 
3-9-35 Iizuka, Kawaguchi-shi, Saitama-ken 332
JAPAN TEL: 048-253-1511
ASG: Beretta M92F, Mossberg M500 Marina, U.S. M1 Carbine, Beretta M9 "Dolphin"
(electric ASG) REP: Walther P-38, Colt S.A.A., Browning M1910, Beretta M92, S&W M586,
Colt M1908 "Vest Pocket", Mauser M712 Snellfeuer, Walther P-38, Browning
Hi-Power, Beretta M9 "Dolphin", Walther PPK/S, Beretta M84, Auto Mag, Baby
Nambu, Luger P-08, etc. (Also has several DYI kits for handguns and long guns, in both
plastic and zinc models)
Maruzen
3-11-11 Yokogawa, Sumida-ku, Tokyo 130
JAPAN TEL: 03-3623-2682
ASG: Remington M870, Beretta M93R, Walther PPK/S, Ingram M11, S&W M4504/4506, etc.
Shoei
5-9-1 Asahi, Kawaguchi-shi, Saitama-ken (ZIP ???)
JAPAN TEL: 048-226-1855/FAX: 048-225-2133
REP: German FG42,
ASG: German MP44, etc.
Tanaka Works
8-15-11 Toyoshima, Kita-ku, Tokyo 114
JAPAN TEL: 03-3919-1857
ASG: SIG/SAUER P.226, H&K P8 (USP), etc.
REP: SIG/SAUER P.226, Glock 17, WW II Arisaka rifles, etc.
TOP
5-33-9 Mukoujima, Sumida-ku, Tokyo (ZIP ???) JAPAN TEL: 03-3829-2081
ASG: Type 64 7.62mm x 51 rifle, M60 GPMG, etc.
Western Arms
Gloria Miyamasuzaka Bldg. 1F, 1-8-5 Shibuya, Shibuya-ku, Tokyo 150
JAPAN TEL: 03-3407-5922
ASG: Beretta M92FS, S&W M6906, Colt Govt. series, H&K MP-5K, Desert Eagle, etc.