The spacecraft on desolate asteroid Ryugu, some 300 million km from Earth, is on a mission of collecting samples in hopes of finding clues to the origin of the solar system.
About 900 mm of rain has fallen on the southernmost main island of Kyushu since late June, with heavy rain forecast to continue into Thursday.
Russia's Emergency Ministry's regional branch initially said that 17 people were missing, but later announced that four of them were found and rescued. The search for the remaining 13 is ongoing.
Five small ships sailed out of the harbour on Monday in Japan's first commercial whale hunt in more than three decades, a move that has aroused global condemnation and fears for the fate of whales.
Vietnam and the European Union signed a free trade deal reducing tariffs on goods of 99 percent traded between the southeastern state and the Union. The deal will boost Vietnams economy by around 5 percent until 2024-2028.
Earlier, President Recep Tayyip Erdogan opened Turkish artist Ara Guler's exhibition in the Japanese city of Kyoto.
US President Donald Trump said during his meeting with Turkish President Recep Tayyip Erdogan that Turkey was not allowed to buy Patriot missiles by Obama administration and "we are looking at different solutions."
Abbas Araghchi, Iran's deputy foreign minister, said progress was made at talks in Vienna aimed at saving the nuclear deal but probably not enough to convince Tehran to change its decision to go over the deal's core atomic restrictions one by one.
World leaders gather in Japan's Osaka port city for a two-day summit with US-China trade war, Iran tensions and climate change on agenda.
G20 nations produce half the world's plastic waste, and Japanese Prime Minister Shinzo Abe, who will chair the summit, has made fixing the problem a top initiative, both at the summit and in Japan.
Responding to a reporter's question prior to taking off for the G20 in Osaka, President Recep Tayyip Erdogan said he did not get the impression from his US counterpart Donald Trump that NATO members would be sanctioning each other over missiles.
As heads of state descend on Japan, all eyes will be on the US and its various crises with other member states, from China to Russia and even Turkey.
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