Named Nepartak, the storm overshadows the Tokyo Olympics.
The effects of the storm will be seen at the Olympics, the Finnish Meteorological Institute says.
The storm is expected to hit the land on Tuesday and Wednesday, according to the Japan Times.
The magazine says that rowing competitions have been brought forward due to the threat of severe weather.
At the moment, it seems that the storm will remain a tropical storm and not grow into a tropical hurricane called typhoons in the area.
In hurricanes, the average wind speed of 10 minutes is at least 33.0 meters per second.
An expert interviewed by the Japan Times estimates that a tropical storm is unlikely to wreak havoc on land, but at sea the waves may well be 10 to 15 meters near the shore, which may make it difficult for certain outdoor sports such as sailing and surfing.
- Unlike in the case of an earthquake, we can anticipate the passage of the typhoon so we can prepare in advance, Olympic spokeswoman Masa Takaya told reporters according to the Japan Times.
- As for rowing, we decided to change the schedules for the sake of certainty, he said.
The Tokyo Olympics will be held from July 23 to August 8.
The Finnish Meteorological Institute anticipates that at least strong winds and possibly heavy rains are known on the continent.
Severe air is forming 1,800 kilometers southeast of the island of Honshu in the Philippine Sea.
Typhoons and tropical storms of the same name have been seen in the Pacific.
The word Nepartak refers to the warrior of the legendary island of Kosrae in Micronesia.
In 2016, a typhoon called Nepartak struck Korea and China, killing more than a hundred people.