Millions of lives are at risk as "Typhoon Chaba" barrels toward the coastlines of Japan after leaving devastation and deaths in South Korea.

The super typhoon, packed with catastrophic winds of up to 375 kph, is expected to make a landfall at Honshu Prefecture on Wednesday evening, placing entire coastal city at high risk.

"Typhoon Chaba" has been forecasted to hit the coasts of Niigata and Sendai while posing catastrophic threats to Fukushima Prefecture. 

The typhoon, last spotted at 120 km north of Tsushima Island while moving at 45 kph, will purportedly affect over 2.3 million residents from the three cities along its path.

The Japan Meteorological Agency has already issued warnings against heavy rains, gusts and floods ahead of the projected landfall of "Typhoon Chaba."

The battering weather disturbance will also affect over 180 commercial flights from and to Japan.

"Typhoon Chaba" will dump 150 mm rainfall in southern Kyushu , Tokai, Hokuriku and Kanto-Koshin regions; 200 mm along Shikoku island and Kinki region; and 180 mm within northern Kyushu.

A big area in the eastern and western Japan will likewise experience heavy downpour of up to 50 mm per hour.

From Japan, the powerful typhoon will be heading towards the Pacific early Thursday.

BBC reported that Chaba ravaged South Korea killing at least six people while damaging the southern cities  of Busan, Ulsan and Jeju.  

The record breaking Chaba is the second most powerful typhoon to hit Japan since JMA started its weather monitoring 1951.

The Daily Express also reported that the strongest so far to hit Japan was Typhoon Vera in 1959. While it did not sweep over the mainland, it had caused 4,000 deaths.