Tsuboi attended Aoyama Gakuin University in the Tohto League from 1992 to 1995. Following his graduation, he spent a couple years playing for Toshiba in the industrial leagues.
|2011 BBM Tohto 80th Memorial #74|
|1998 BBM #370|
|2001 Upper Deck #100|
|2004 BBM 1st Version #146 (Facsimile Signature Parallel)|
|2012 BBM Strongest Generation #081|
As far as I know, there are no cards of him with any of the indy teams he's been with the last few years.
Tsuboi never lead the league in any major category but his rookie season was recognized by Central League with a "CL Special Award" that was commemorated by BBM in their 1999 "flagship" set (#543):
|1999 BBM #543|
He made the All Star team twice, in 2000 and 2003. He played in three Nippon Series, winning it all in 2006 and playing on the losing side in 2007 and 2009.
|2003 Calbee #AS-52|
|2009 BBM Nippon Series #S54|