Bon Festival
Bon Festival is held on July 15. Kantō region, Japan. This event in the second decade of the month July is annual. 
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The festival of Obon lasts for three days; however, its starting date varies within different regions of Japan. When the lunar calendar was changed to the Gregorian calendar at the beginning of the Meiji era, the localities in Japan responded differently, which resulted in three different times of Obon. Shichigatsu Bon (Bon in July) is based on the solar calendar and is celebrated around the 15th of July in eastern Japan (Kantō region such as Tokyo, Yokohama and the Tōhoku region), coinciding with Chūgen. Hachigatsu Bon (Bon in August), based on the lunar calendar, is celebrated around the 15th of August and is the most commonly celebrated time. Kyū Bon (Old Bon) is celebrated on the 15th day of the ninth month of the lunar calendar, and so differs each year, which appears between August 8 and September 7.
Similar holidays and events, festivals and interesting facts
Nachi Fire Festival in Japan on July 14 (Nachi-no-Ogi Matsuri);
Marine Day or Ocean Day or Sea Day in Japan on July 15 (is a Japanese national holiday celebrated on the third Monday in July);
Gion Matsuri in Kyoto, Japan on July 17 (祇園祭 is one of the most famous festivals. It lasts all of July and ends with the Yamaboko Junkō parade on July 17 and 24. Initially, it was dedicated to fighting the plague in 869);
One Piece Day on July 22
Letter Writing Day in Japan on July 23 (The Letter Writing Day can be a bit confusing... as we found on numerous sites that this 'holiday' falls on 7th of December, then again on the official World Letter Writing Day page the date is 1st of September, and Japan issues LWD stamps each year, for over two decades now, on 23rd of July. In any case, its a nice way of reminding people of the existence of letters);
Tenjin Matsuri in Osaka, Japan on July 25 (colorful festival);
Yurei no Hi in Japan on July 26