This is 京一輪 (Kyouichirin? I think?), a big, fancy, expensive umeboshi from Ousu no Sato (おうすの里) in Gion.
Kyouichirin umeboshi cost 300 yen. Not per box–300 yen each!
This thing costs 300 yen! But it’s sooooooo good!
Umeboshi range from honey-sweetened to mouth-puckeringly sour, but Kyouichirin is the sweetest umeboshi I’ve ever tasted. It tastes like a fruit, without any hint of sour or pickly taste.
This is how I eat umeboshi. Watch out for the pit!
Ousu no Sato is on the left side of Shijo Street (四条通) if you’re walking up the street with Kawaramachi Station (河原町) behind you.