2021.05.20Introduction of "Irodori" online course
Anyone can study the "Irodori" online course for free <= free, XNUMX yen> using the Internet.
Try studying using your smartphone, computer, or tablet.
"Irodori" online course https://www.irodori-online.jpf.go.jp/
About "Irodori" textbooks https://www.irodori.jpf.go.jp/
