Ichiro was the biggest thing in baseball as far as Japan was concerned in 2002. After his amazing "rookie" season, companies were quick to take advantage of Ichiro Mania. One interesting promotion was with a health drink called Yunker. I'm not sure what the actual requirement was, but by buying Yunker you got Ichiro cards.
After my "discovery" last November, I've been keeping my eyes open for full sets. I grabbed a nearly-complete set along with the mini-album to hold it, and finally got my last card a couple weeks ago. The final card was #19.
Shown below are the 20 cards in the set, front and back. The design remains the same, and the stat lines are identical, but the cards sequentially tell the story of Ichiro's MLB career from April 2001 through early May, 2002.