Photo/IllutrationIn this Nov. 14, 2018, file photo, Boeing 737 MAX 8 planes are seen parked near Boeing Co.'s 737 assembly facility in Renton, Washington. (AP Photo)

No Japanese airlines currently fly the Boeing 737 Max 8 plane, which is under intense scrutiny following two crashes in recent months.

Four foreign airline companies that use the aircraft have since suspended operating them on all flights to and from Japan.

A 737 Max 8 used by Ethiopian Airlines crashed soon after take-off on March 10 from Addis Ababa, killing all 157 passengers and crew.

According to officials of the Ministry of Land, Infrastructure, Transport and Tourism, the four airlines are Xiamen Airlines and Shandong Airlines of China; SilkAir, a subsidiary of Singapore Airlines; and the South Korean low-cost carrier Eastar Jet.

Ministry officials said the airlines were likely using substitute aircraft, as there were no reports of canceled flights. However, it remains to be seen how long the companies can continue with all flights if some planes are unavailable.

"We have no idea what effects will emerge," one ministry official said.

Meanwhile, a spokesperson for All Nippon Airways Co. said the company was keeping a close eye on investigations into the Ethiopian Airlines plane crash. ANA plans to purchase 30 of the 737 Max 8 planes from 2021.

"As we have not yet heard directly from Boeing, we have no way of making a judgment," a company official said.

Japan Airlines Co. has no plans to acquire the 737 Max 8.