Can you marry him? Is there any secret marriage with him like there has been in other games?
He seems to really enjoy the Mugwort Daifuku. I gave him one just to clear out my inventory and he was doing the excited/happy emote characters do. "Th-This is--!" I would definitely say it's one of his loved gifts.
he loves any quality grilled fish and will thank you for it .
he will be next to Iori's house every day apart from Rainy weather and severe weather conditions like blizzards
Matsuyuki loves the Shiny Watch, declaring “This is-!” and gets very excited to it. I haven’t tried theGrilled Fish yet, but will try that next. He doesn’t seem to care for leeks... don’t try that on him. I think it’s either a Neutral or a Dislike.