Languages › Japanese Meaning of Saikou in Japanese Share Flipboard Email Print Saikou; Mr. Fuji. I love Photo and Apple./Getty Images Japanese Essential Japanese Vocabulary History & Culture Japanese Grammar By Namiko Abe Japanese Language Expert B.A., Kwansei Gakuin University Namiko Abe is a Japanese language teacher and translator, as well as a Japanese calligraphy expert. She has been a freelance writer for nearly 20 years. our editorial process Namiko Abe Updated April 18, 2018 Saikou is a Japanese word meaning the highest, or supreme. Learn more about its pronunciation and usage in the Japanese language below. Pronunciation Click here to listen to the audio file. Meaning the highest; supreme; maximum Japanese Characters 最高 (さいこう) Example & Translation Kyou no saikoukion wa sanjuu-do datta.今日の最高気温は三十度だった。 or in English: Today's highest temperature was thirty degree.