They’ve discovered that farmed puffers don’t have toxic organs. The poison comes from the food they naturally ingest, so farming them on a special diet makes them safe.
https://www.smithsonianmag.com/arts-culture/new-improved-fugu-now-without-poison-81301903/
After how Japan mangles names and words into katakana I can’t get too worked up over languages without (formally transcibed) vowel length forget a macron or double letter in publications for non-speakers.
Besides, I don’t think the h thrown into Ohtani is gonna make Dodgers fans say his name any different than without it. It would be similar to trying to get a random Japanese person to use vowels outside the five sounds they have.