19 points. I basically don't know any of those singers.
Oh? Care to spoil-post?
Okay. And it's actually 18 if all are correct.
Blue Category [1] 3 - What is the difference between the words "Boku" and "Watashi"? Watashi is the generic first person singular pronoun. Boku is usually used by young males. 4 - Kawaii means cute. What does Kowai mean? Scary.
Green Category [2] 2 - The act of darkening one's skin complexion while wearing contrasting makeup is a fashion style known as what? Ganguro 3 - If you stood face-to-face with the renowned Hachi statue, you would be in what city? Hachiko? Shibuya, special wards, Tokyo. 5 - What does the use of a w or many consecutive ws indicate in online chat? Laughter, from "warai." Essentially Japanese for "lol".
Yellow Category [3] 1 - What is the number translation to "ni hyaku go juu ichi?" 251 2 - If you lived in Ryukyu, your city would be best mapped in what Pokemon game? Ruby/Sapphire/Emerald
Orange Category [4] 3 - Comiket is a convention that takes place twice a year in what city in Japan? Tokyo Big Sight, in the Tokyo bay area, in Tokyo. Not sure which ward, but the trains that go there are Yurikamome and Rinkai.
Bingo. 18 points. Very nice! You are the new leader, if that is a good thing.
Still hoping to see a red one guessed by someone. ---