Dhaka, Sept. 3 -- Though the United States is Japan's most important ally, Tokyo has fostered economic ties with Iran, and Japanese firms had been major buyers of Iranian oil until US sanctions forced them to find other suppliers.

Citing unidentified government sources, the Yomiuri said Japan was considering a plan to send its Maritime Self-Defense Force (SDF) on information-gathering missions in the areas around the Strait of Hormuz and Bab al-Mandab shipping lane between Yemen, Djibouti and Eritrea.

It would also consider including the Strait of Hormuz in the SDF's sphere of activity if Iran agrees, the paper said.

Asked about the newspaper report, Japanese Chief Cabinet Secretary Yoshihide Suga declined to mention specific measures ...