Warning: No first hand experience, but I was doing some research as well since I'm likely going next year, so allow me to share a bit:
Labs in Osaka:
Horiuchi Color - Osaka
Address: 大阪府大阪市北区万歳町3-17
Banzai-cho 3-17
Japan 530-0028
Phone: (06) 6313-2351
Fax: (06) 6313-3575
Email:
osaka@horiuchi-color.co.jp
Web Site:
http://www.horiuchi-color.co.jp/office/osaka/
Hours: M-F 9:00-21:00, 1st, 3rd, and 5th Sat. 9:00-17:00, 2nd and 4th Sat. 9:00-12:00 pickup only, closed Sun.
Other Info: Osaka branch and head office of this leading pro lab chain. It also houses the Archive Support Center and Osaka Media Center.
Near Nakazaki-cho Station (Tanimachi subway line). Also walkable from JR Osaka Station East Exit.
Pro-Lab Create - Osaka
Address: 〒541－0053大阪市中央区本町4丁目6番17号　IS本町ビル1F
IS Honmachi Bldg. 1st floor
Honmachi 4-6-17, Chuo-ku, Osaka
Japan 541－0053
Phone: (06) 6261-2323
FAX：(06) 6261-3737
Web Site:
http://www.prolab-create.jp/shop/map13_oosaka.html
Hours: 9:00-18:00, closed Sat., Sun., national holidays
Other Info: Near Honmachi Station on Yotsubashi/Midosuji subway line.
Kyoto:
AMS 写真館
〒604-8425　京都市中京区西ノ京銅駝町48　A'BOX
営業時間
平日　9：30～18：30
土・日・祝　9：30～18：15
http://www.amsnet.co.jp/about/ab_03.html
カメラのナニワ
カメラのナニワ 京都店
Address
Tel 京都市下京区四条通御幸町西入奈良物町372番
(075) 257-7100
http://www.cameranonaniwa.co.jp/shop_list/index.html
Professional Labo Kyoto
http://labo-kyoto.com/home/labokyotoinfo/
〒600-8423 京都府京都市下京区釘隠町248-1
TEL 075-353-4188 FAX 075-353-4189
Hope it helps. Film you can probably buy from these places as well. If not, I believe bic camera or yodobashi will sell. Film camera/lenses wise:
http://www.net-chuko.com/static/public/about/buy-info/buy-info_english.html
http://hammerhead-shark.blogspot.sg/2012/05/above-osaka-and-second-hand-camera.html <<< this blogpost might help as well.
