Former Prime Minister Yoshiro Mori on Sunday left Tokyo for India to ask New Delhi for restraint in the standoff with Pakistan over Kashmir.
He will also attend a ceremony to mark the 50th anniversary of bilateral relations, Japanese officials said.
Serving as a special envoy of Prime Minister Junichiro Koizumi, Mori is expected to meet Indian Prime Minister Atal Behari Vajpayee. He will deliver a letter from Koizumi and renew a request that New Delhi exercise restraint over the territorial dispute in the Kashmir region, the officials said.
Mori is also scheduled to take part in the opening ceremony for Japan Week, commemorating the anniversary of the establishment of diplomatic relationship between the two nations, before returning to Japan on Wednesday.