Which haiku poet is known for works about small creatures and insects?

Kobayashi Issa is the haiku poet especially known for works about small creatures and insects. His poems often focus on humble animals such as snails, frogs, fireflies, fleas, mosquitoes, flies, and cicadas.

Issa lived from 1763 to 1828 and is regarded as one of Japan’s four great haiku masters, alongside Matsuo Bashō, Yosa Buson, and Masaoka Shiki. His attention to tiny creatures was not merely descriptive: he frequently used them to express compassion, loneliness, humor, and the struggles of ordinary life. His tone can be tender, conversational, or wryly comic.

He wrote more than 20,000 haiku, and commentators have counted dozens about snails, hundreds about frogs and fireflies, and many others about insects. This abundance makes his subject matter distinctive even among major haiku poets.

Bashō is more strongly associated with travel, landscapes, and spiritual stillness; Buson with painterly imagery; and Shiki with modernizing haiku. Those poets also wrote about nature, but Issa’s intimate attention to overlooked creatures is the clearest match for this question.