I have a 昭和二年, or year 2, of that same coin and yours looks a lot like mine, which graded as an MS 65 RB, yours doesn't look quite as red, it could be the photo, but I'll go with that anyway.
Good strike, lovely luster, don't think it has enough original color for Red but I think it achieved gem MS65 RB
It’s a beautiful example and I love Japanese coins but why would you spend the money to grade that coin?
I didn't. I picked this up in a group of 4 graded Sens. One that I got in the group sold in 2015 on GC for $68. I got all 4 for less than half that. Two of the 4 happen to be Top Pop, but, I bought them so I had more coins to play the CT world coin games. Believe it or not! @Rheingold called it! MS66 RB - Top Pop
My guess was going to be MS 66 but I was debating hedging down to MS 65. Looks relatively clean and lustrous. Great deal that you got on that lot!