Missing Airports in Japan

Oki Airport - OKI
Okinoerabu Airport - OKE
Okushiri Airport - OIR
Oshima Airport - OIM
Rishiri Airport - RIS
Shizuoka Airport - FSZ
Shimojishima Airport - SHI
Saga Airport - HSG
Shonai Airport - SYO
Tarama Airport - TRA
Tokunoshima Airport -TKN
Tottori Airport -TTJ
Tsushima Airport -TSJ
Yakushima Airport -KUM
Yonaguni Airport -OGN
Yoron Airport -RNJ

Just to name a few....