The IPO offered 2.32 billion shares for a price of 1,200 yen apiece, valuing the offering at 348.6 billion yen ($2.3 billion)

Tokyo Metro Co. shares opened at 1,630 yen ($10.8) in their Tokyo Stock Exchange debut Wednesday, far above its offer price of 1,200

Shares of Tokyo Metro rose in their trading debut after its initial public offering raised about $2.3 billion, the largest IPO in Japan in nearly six years.

Tokyo Metro Co.’s stock is primed for healthy gains when trading starts on Wednesday after its initial public offering drew strong demand from investors.

Tokyo Metro, the underground railway network that carries more than 6.5mn passengers a day through the Japanese capital at levels of punctuality and cleanliness envied around the world, will list its shares on the Tokyo Stock Exchange on Wednesday in the country’s biggest initial public offering in six years.