I discovered recently that I had missed a set when I did my round up of the 2006 World Baseball Classic sets a few years back. There was also a 15 card insert set for the Upper Deck Ovation set called "Ovation Nation". There are only two members of the Japanese team included in the set - Daisuke Matsuzaka and Nobuhiko Matsunaka - although there are four other players who ended up playing in NPB - Seung-Yeop Lee of Korea (Marines/Giants/Buffaloes 2004-2011), Andruw Jones of The Netherlands (Eagles 2013-14), Daniel Cabrera of the Dominican Republic (Dragons 2013-14) and Frederich Cepeda (Giants 2014-). You can see the entire checklist here.
Here's some example cards:
This brings the totals for the 2006 WBC sets to 335 cards over eight separate sets with 56 cards for the champion Japanese team. Matsunaka is the only Japanese player to appear in all eight sets.