As the strongest and most powerful of the new generation of kami, she ascended to rule in the heavens. She was the Kami of the Rising Sun, and all of Japan flourished under her light. Her husband, Tsukuyomi, Kami of the Moon, shone pale and silvery beside her. He was not radiant like his wife, but striking in his own way. However, like the tides that he swayed with his power, he was prone to change - sudden and often terrible.
One day, Amaterasu was invited to attend a banquet by the Kami of Food - Uke Mochi. Overwhelmed with other heavenly duties, Amaterasu asked her husband to attend in her place. He solemnly agreed.
Sullen and pale, Tsukuyomi sat in the seat of honor at the banquet. The table full of other high-ranking kamis chatted pleasantly around him. The table was made of solid gold and engraved with the most intricate designs, some too small for the human eye to observe. Goblets and plates were arranged tastefully. But there was no food anywhere. None of the kamis pointed this out, although some began to exchange glances. Where was the food?
Suddenly Uke Mochi rose from her seat. “I’m sure you’ve been wondering where the food is!” she said jovially, with a smirk on her face. “But as the Kami of Food, after all, I thought I’d take this time to show you a little party trick.” Uke Mochi climbed up on the table, lifting her robes so that she didn’t knock over anyone’s glass. She stooped and picked up a large bowl from off the table, held it to her face, and suddenly with a horrible retching noise vomited profusely. Everyone gasped, but when Uke Mochi sat the bowl down it was full of savory smelling soup! She then stuck her finger up her nose and began pulling out strings of green beans, which she piled on an ivory platter.
“Who’s hungry?!” she called and the kamis began to laugh and clap. Leave it to Uke Mochi to make a normal dinner party a memorable occasion! Tsukeyomi, however, was not amused.
Uke Mochi went down the table and began urinating wine into the glasses of different kamis, who were now beginning to laugh hysterically and demand special orders of food from her as she galavanted up and down the table.
Tsukuyomi grew more and more offended. Suddenly he leapt on the table, overturning the dishes and bowls and goblets, and without any warning, drew his sword and cut off Uke Mochi’s head! The kami screamed, scattered, and emptied the hall as Uke Mochi’s hot red blood began spreading over the table.
When Amaterasu heard what had happened, she flew into a rage. She could not believe that her consort had acted in such a manner. Tsukuyomi tried to defend himself. "I cannot believe that Uke Mochi dared invite you to such a disgusting show! She deserved to die for her disrespect!" he cried, but it was in vain. Amaterasu, wise and fair, shook her head. She could never see him the same way again, and she had to punish such a heinous crime. Amaterasu banished Tsukoyomi from heaven forever. This is why Day and Night are forever separated.
Author's Note: This story is a "just so" story. It is a myth that explains a natural phenomena - in this case, why the sun and moon are always separated. There are lots of stories like this in mythology generally, but I hadn't noticed very many in Japanese mythology, so this one stood out to me. I think the concept of the sun and moon having begun as a married couple and then suffering a separation is a unique idea! As you can tell though, this particular myth was very strange. However, it is the only story where Tsukuyomi features prominently. As such, I thought it was important to include in this storybook. There was not a lot of information about it I could find, and different versions included different details, so I had to synthesize them to create this version. Also, although this is a very gross story, I tried to retell it in a way that wasn't too disgusting. It was fun to retell the story of how Amaterasu and Tsukuyomi's marriage dissolved, and I hope you enjoy it!
Bibliography: Wright, Gregory. “Tsukuyomi.” Mythopedia.