He certainly has the counting stats, that's for certain. Ichiro has never walked much in the MLB, but in Japan he actually posted very strong walk rates. He was also intentionally walked a lot, at least 13 times in his final 6 seasons in Japan. He was far more of a power threat In Japan than he was in the MLB.
Despite the fact that his Nippon League stats may not technically count towards his Hall of Fame candidacy, they should be observed. Ichiro has been playing professional baseball since he was 18 years old, albeit not becoming a starter until 20. He played at his final 2 games in 2019 at 45! To be fair, though, Ichiro hasn't been a star-caliber player since 2010. His 2011 was awful, with a .645 OPS. His defense wasn't all that elite that year, either, although his defense has been an asset since joining the Yankees in 2012. He enjoyed 6 and 8 DRS marks in 2012 and 2013, and was still positive at 1 DRS in 2014. He rebounded with 6 DRS in 2015 and 2016. In 2017 he regressed to -1 and in 2018 he fell further to -2. Still, even into his forties, he was a plus in right field for a very long time.
In his career, Ichiro has a 102 DRS in right field. That's pretty amazing. It's possible had he spent more of his career in center field (that the Mariners always had occupied by someone else), he would've saved even more runs and been even more valuable. That being said, he's been worth 59.4 WAR to Baseball-Reference. Imagine if he'd played more games in center field how his high batting averages and spectacular defense would've affected those totals!
Ichiro is a Hall-of-Fame caliber player. If he'd played for some better Seattle teams, or had played more center field, his overall value would've been higher. His years in Japan of being one of the greatest players in their league cannot be dismissed, either. Even after some mediocre years with the Marlins, it was nice to see him return to the Mariners for a last hurrah. Plus, he's a classy guy and it's near impossible not to like him.
Here's to a great career, Ichiro!