Messaging app Line rocketed in its Tokyo trading debut, soaring 50 percent above its initial public offering price, after the biggest technology share sale this year.

The shares roared to 5,000 yen in early trading, up from a 3,300 yen IPO price, after going untraded at the open as buy orders swamped sell orders.

Line, owned by South Korea's Naver, also debuted in New York overnight, soaring about 27 percent by the close.