口語体

こうごたい

noun

•

colloquial style, written style based on spoken language

口	mouth
語	word, speech, language
体	body, substance, object, reality, counter for images

いんよう

ぶんしょう

おも

、

こうごたい

か

ほん

I expect you can tell from the quoted text, but this is a book written in a colloquial style

はなし

こうごたい

にちじょう

ことば

かた

These stories are told in colloquial and everyday language