Men's shirt from Brooks Brothers. The collar has a light blue lining. There is no Japanese size listed, but it's a size L in the US and Mexico, so it's likely a size LL in Japan (see photo 5). I think it hasn't been worn very often. Shoulder width: 44cm Length: 81cm Sleeve length: 65cm ⚠️This is an item from an estate sale⚠️, so please understand this before purchasing.