Narashige Koide (小出楢重, Koide Narashige, October 13, 1887 – February 13, 1931) was a Japanese painter and illustrator, noted for his work in pioneering the Hanshinkan Modernism trend in yōga (Western-style) portraiture and nude painting in early 20th century Japanese painting.

Although he was able to study under famed Nihonga painter Shimomura Kanzan, he was still drawn to oil painting.

After graduating in 1914 he returned to Osaka and continued to paint and entered a yōga-style portrait group titled "N-Family" into the 1919 6th Nikakai (Second Division Society) Exhibition, where he won the Chōgyū Prize.

In the Nikakai exhibition of 1920 his portrait of the "Young Girl Omme" received the Nika Prize.

He received numerous commissions following these successes, and experimented with a variety of media, including painting on glass.