類 (Kanji for category,type)

Onyomi

RUI	LOUIE LOUIE falls into the category of a rock song.

This type of rice is as big as your head - It's KIND OF big!!

人類(じんるい)	race of people ★★★★☆ 人 (person) + 類 (category,type) = 人類 (race of people)
種類(しゅるい)	variety or type of thing ★★★★☆ 種 (seed　/ type or kind) + 類 (category,type) = 種類 (variety or type of thing)
分類(ぶんるい) する	to classify or divide into groups ☆☆☆☆☆ 分 (understand / divide / minute) + 類 (category,type) = 分類 (to classify or divide into groups)

toDAY's topic is a BIG category: the number of WOMEN with imaginary HEARTS.