I have always felt Ohashi would work well as a 10, playing as more of a second striker like Szmodics did, remember he wasn't a particularly "creative" 10 like Ozil but a poacher running from deep.
Ohashi's passing vision is fine, and his positioning is good. He also makes all the other forwards he plays with better through his pressing.
People are too harsh on him for being run ragged by Ismael with no support. If we played better as a unit, with a front four of Gudjohnson, Jorgenson on left, Ohashi 10 and Morishita on right, I think that would complement reasonably well, with Afolayan on a wing if Jorgenson struggles.