If you need to do maintenance on your boat in Okinawa, there are a number of resources that can help you:
Boat Supplies

Miyagi Sangyo
Miyagi Sangyo, located in Tomari Port, is the place to get charts and general marine supplies. If they don’t have what you need, they can order it for you.
Open Monday – Saturday, 9am- 5:30pm
Phone: 098-861-3141

Miyagi Sangyo, located in Tomari Port, Naha

Harada Marine Supplies
Harada Marine Supplies, located in Awase, has a selection of general boating supplies, including good quality nylon dock line and chain.
Open Monday – Saturday, 9am- 5:30pm
Phone: 098-937-5955

Harada Marine Supplies

Orient Bussan
Orient Bussan, located on rte 329 in Kin Town has a selection of general boating supplies, including a good selection of anchors and used engines.
Open Monday – Saturday, 9am- 5:30pm
Phone: 098-965-3184 / 3172

Orient Bussan, located on rte 329 in Kin Town

Kokusai Paint
Kokusai Paint, located in Tomari Port next to the international cemetery and accross the street from the
JCI office and 3 blocks down from Miyagi Sangyo, is the place to get marine grade FRP, epoxy resins and painting supplies.
Open Monday – Saturday 9am -5:30pm
Phone number: 098-868-2181
Sail Design and Repair

Kozzy Sail Design Shop
Kozzy Sail Designs is the place to have sails and canvas repaired and to have custom sails and canvas work made. Located near Ginowan Marina.
Phone number: 090-1179-6707
Call Koujiro-san and he might meet you at the marina.
To be added:
Sail On… general maintenance and contracting
Shingo-san… fiberglass, painting and general boat repair
China-san… engine and general boat repair
Sakihara-san… woodwork
Iki-Miyagi-san… fiberglass and woodwork
Makiminato metal shop
East Marine… Boat Yard in Itoman
Others?
This post is also available in: Japanese