The Pokémon Company has announced a new distribution event for Pokémon Ultra Sun and Ultra Moon players in Japan. According to promotional material at official Pokémon Center stores, Jirachi will be distributed at the Pokémon Center in the Tōhoku region from August 1 to August 31 to commemorate the Japanese Tanabata Festival. Specific details about this particular Mythical Pokémon distribution have yet to be announced, but stay tuned for any updates.
Jirachi distribution event announced for Pokémon Ultra Sun and Ultra Moon from August 1 to 31 in Japan
Pokémon Blog 