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)

The main operator of Tokyo’s sprawling subway network has made a rip-roaring market debut in Japan’s biggest initial public offering (IPO) in six years. Tokyo Metro Co’s shares soared by as much as 47 percent above their issue price of 1,200 yen ($7.9) on Wednesday, topping 1,760 yen ($11.6) before settling just above 1,700 yen ($11.2).

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.

The trading debut of Tokyo Metro Co., which runs one of the world’s largest subway systems, is set to support the bull case for the Japanese stock market after an oversubscribed public offering.

Perks, including access to the company golf range and free tempura, are reportedly luring retail investors to Japan's biggest initial public offering in six years. Japanese citizens are anticipating a public offering from Tokyo Metro Co.