There are Japanese classes taught by a Japanese teacher and classes taught by a bilingual teacher. There are group lessons, small group lessons, individual lessons, etc.
The groups bellow are working to provide several opportunities to study Japanese to those who are interested to learn it.
(All the links bellow are of other sites)

• Japanese Lessons in Western Area in Shizuoka
• Hamamatsu Fundation for Intelnational Communication and Exchange (HICE) / Hamamatsu Foreign Resident Study Support Center (U-ToC)
• Other Japanese Classes in Hamamatsu
• Iwata Association for International Communications and Exchanges (ICE)
• Iwata-shi Kokusai Kouryu Center KON-NICHIWA
• Kosai Kokusai kouryuu kyoukai (KOKO) Kosai International Center
• Fukuroi International Friendship Association (FIFA)
• Kakegawa International Center (KIC)