HAN-GE-SHOU (半夏生) [more than 4 seasons]
HAN-GE-SHOU(半夏生) is one period of Japanese original calendar called “ZASSETSU(雑節)”. It starts 11th day of GESHI(夏至) “The 24 seasons(二十四節気)” and lasts for 5 days.
This article tells you that “Food eaten on HAN-GE-SHOU”, “Weather tips to travel this time of the year in Shikoku” and “Trip-tips for travel photo lovers”