It seems as though Nintendo’s Pokémon Go has been a monumental success for the company, if their meteoric rise in their stocks is anything to go by.

Since the release of their mobile app, Nintendo experienced a 23% rise in their stock on Monday morning in Japan, with a 10% occurring  on Friday. The 23% rise added 7.5 billion dollars to the company’s market value.

According to Bloomberg’s David Ingles, the 23% rise is the best one day move for the stock since 1983, which was the year that the Famicom released in Japan.

With this massive rise, it’ll be interesting to see what the company has in store for the mobile market.