What were those jackets called Yuusuke wore during the first half of Decade?

Ryuutaros

"Training."
You know the ones that look like what High School kids wore? I love them. I would to know what they are called.
 
If you're looking for them on Yahoo!Japan though, based on Rinkya's browsing thingy, it'd go as Stadium Jackets iirc.
 
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