いろんなフォントで「square_off」変換
Zen Old Minchosquare_off
Yusei Magicsquare_off
M PLUS 1square_off
Shippori Antiquesquare_off
Yuji Maisquare_off
Dela Gothic Onesquare_off
DotGothic16square_off
Train Onesquare_off
Hira Minchosquare_off
Potta Onesquare_off
Reggae Onesquare_off
Sticksquare_off
Zen Kurenaidosquare_off
Kosugi Marusquare_off
Rampart Onesquare_off
Hachi Maru Popsquare_off
New Tegominsquare_off
RocknRoll Onesquare_off
Kaisei Decolsquare_off
「square_off」をコピペできる装飾文字に変換（旧字体・丸囲みなど）
