After a bit of looking through, I'm certain that it would be broadly transcribed in IPA as /tsi.sɑ.nɑ/, which would be transcribed on BTN as TSEE-SAH-NAH.
My PNL:
http://www.behindthename.com/pnl/149249'Maybe It Is Daijiro (aka Maks)' blog:
https://maybeitisdaijirou.wordpress.com/'Beyond Sakura and Hiroshi' blog:
https://beyondsakuraandhiroshi.wordpress.com/My Twitter: @maybeitsdaijiro