Adjusted the family/given name break. Okawara is 大河原 (おおかわら), not just 大河. He's got a small little profile here:
http://k-mp.jp/newpage14.html.
Seems like this may be his Twitter account:
http://twitter.com/wataruokawara. It's really sparse so I can't confirm it, but
Google's cache says his display name used to be "大河原 渉," not "Wataru Okawra" as it is now.