Aki is active as both a surf guide and a photographer. He is a specialist in Sumatra and Mentawai and has shot some cool images like this.
The website is below, so if you are interested in boat trips, please take a look. ↓Japanese ■■■ http://ww8.tiki.ne.jp/~soulaki/ ↓English ■■■ http://www.sumatransurfariis.com