When a person is into something, in particular, it makes sense to wear clothing that shows that off. It is an instant in conversation starter and allows people to really connect with others out there.
One of those niche markets just happens to be anime. Some people are fully embracing their love of anime, while others want to passively watch it without really showing too much bias towards it. Anime clothes for men are not hard to find, especially online with so many different ways to show options.
It’s a little difficult to find a time of clothing in a store, mainly because there are not a lot of people locally who might want the same type of Style. It’s very hard for a company to carry so many different style options, especially with such limited space in a store as opposed to unlimited space online.