Cyclists Ron Rutland (left) and James Owen (right) arrive at the Tokyo stadium, as they complete their bike expedition from England's Twickenham ahead of the 2019 Rugby World Cup. Photo: AFP

A super typhoon among the most powerful in decades was set to hit Japan this holiday weekend, weather officials warned Wednesday, and could severely disrupt both the Rugby World Cup and Formula One Grand Prix.

Typhoon Hagibis, currently classed as "violent" - the top end of Japan's storm scale - is on track to directly hit part of ­Japan's east coast, possibly barrelling straight into Tokyo on Saturday, although it may weaken significantly by then.

It could wreak havoc on the Rugby World Cup being hosted in Japan, potentially washing out several key games. Practice for the Japan Grand Prix also starts Friday in the western city of Suzuka.

An official from Japan's Meteorological Agency (JMA) said the storm is currently as strong as four of the biggest typhoons to hit Japan in recent decades, including Faxai, which struck the Tokyo region last month causing widespread damage in the Chiba area.

Hagibis "will have a power that matches these four typhoons, and we expect maximum wind speeds of 45 meters per second on Saturday, the official said at a briefing.

"The typhoon will bring heavy rains to a wide area... strong winds will come first, followed by rainstorms," he added.

"We ask residents to carry out voluntary evacuations at early stages, paying attention to evacuation advisories issued by local municipalities."

In a statement, the JMA warned that "is possible that violent winds, torrential rains, high waves and violent waves will be seen across the nation."

On Wednesday evening, the typhoon was churning above waters in Western Pacific, packing gusts up to 270 kilometers per hour, the weather agency said. 

The current track has the storm veering towards Japan's central coast, but its final path remains uncertain.

The JMA organised the ­briefing in part because the country has a three-day weekend from Saturday through Monday, when many Japanese travel.