Purchased at a vintage shop. The brand is listed on the tag. I think I bought it for around 20,000 yen. Washable wool check short-sleeved shirt, size M, with a chest pocket. - Color: Ice blue - Material: Wool (washable) - Design: Check pattern - Size: M - Pocket: Chest pocket 80% wool 20% polyester So it can also be used as trekking wear. acut ACUT Mountain shirt, Yamato Michi, trekking wear Thank you for looking.