Can I send a short message to Japan? How to send?

Take your mobile phone and send it directly to his number: 008180-(absolutely 200%, my friend and I send it like this every day)

But you can't type Chinese. Some Chinese characters are garbled. You can type Roman characters or English. (But now it seems that there are several mobile phones that can make calls in Japan, or you can buy a Japanese parallel mobile phone. So you can call him directly in Japanese. )

But maybe he can send you Japanese directly. My mobile phone is. Accepting Japanese text messages is not garbled, but I sent him Chinese text messages, and he couldn't see some Chinese characters. (cost 1 yuan/article. The cost in Japan is: 50 yen/piece. )