Meaning: A chant used when carrying a Mikoshi at Japanese festivals is said to unite everyone and work together.
At traditional Japanese festivals, people carry Mikoshi (portable shrines). A mikoshi is a portable shrine used as a vehicle for divine spirits at shrines and festivals. Many of them are made of black lacquered wood, decorated with phoenixes and other figures on the roof, and two sticks are pierced through the platform, and many people carry them on their shoulders.
Wasshoi is the chant used when carrying the Mikoshi, meaning that everyone unites and joins forces.
Wasshoi is not used in everyday conversation except when carrying a portable shrine. However, it may be used for Twitter’s ID, store name, and some advertising phrases.