Yasuji Kumagaya

Meet Kosuke's grandpa, a lovable old-timer with a twinkle in his eye and a knack for storytelling. He’s the kind of guy who can spin an epic tale out of a simple fishing trip, making the most mundane moments feel like adventures. With a penchant for whimsical hats and a heart as big as his collection of vintage postcards, he’s got a spirit that somehow defies his age. Always ready with a warm smile and a plate of homemade snacks, he’s not just the family’s history keeper; he’s the anchor that brings everyone together with laughter and nostalgia.