23 January : Mount Kusatsu-Shirane erupts. According to the Fire and Disaster Management Agency of Japan in a confirmed report, 1 fatality results and 11 people are injured in Gunma Prefecture.[4]
31 January : A fire burns an elderly support facility in Higashi-ku, Sapporo, Hokkaido. According to the Fire and Disaster Management Agency of Japan in a confirmed report, 11 people died, with three injured.[5]
February
5 to 8 February : A heavy snowfall hits the Sea of Japan. According to the Fire and Disaster Management Agency of Japan in a confirmed report, 22 people died, with 320 injures.[6]
12 March : According to the Japanese Government, an official confirmed that the Japan Ministry of Finance rewrote 14 decision documents in accordance with the response about a cooperative school in Osaka Prefecture to the National Assembly in 2017.[9]
13 March : According to the Japan Forestry and Forest Products Research Institute, an official report confirmed the Kumano cherry tree (Kumanozakura) as a new species Cherry tree (Sakura). The tree was discovered widely throughout the Kii peninsula. The last new type of Sakura tree found in Japan was in 1915.[10]
9 April : A Richer Scale 5.7 magnitude earthquake hit in Oda, Shimane Prefecture, according to the Fire and Disaster Management Agency of Japan in a confirmed report, nine persons were injured.[page needed]
11 April : According to the Fire and Disaster Management Agency of Japan in a confirmed report, a sudden landslide occurred on a mountain slope in Yabakei, Nakatsu, Oita Prefecture, where six person fatalities in the incident.[page needed]
19 April : According to a Japan Meteorological Agency confirmed report, Mount Iou erupted for the first time since 1768 in border between Miyazaki Prefecture and Kagoshima Prefecture.[11]
9 June - According to the Japan National Police Agency in a confirmed report, 22-year-old unemployed Ichiro Kojima was detained by police after stabbing 3 passengers, killing one, on a bullet train leading from Tokyo to Shin-Osaka, nearby Odawara, Kanagawa Prefecture. [page needed]
26 June - According to Japan National Police Agency confirmed report, a man murdered the police officer in policebox, depriving the handgun and escaping, after a man killed to a security guard man near a nearby elementary school in Toyama City. A twenty-two years old detained, after critical condition by with attempted suicide.[page needed]
28 June – 9 July: 2018 Japan floods - Heavy floods was started in western areas of Japan, most in the Hiroshima Prefecture, which has been hit by torrential rain. As of 20 July, 225 people were killed, another 13 were declared missing and 1.5 million people were displaced.[12]
9 July – 26 August: The 2018 Northeast Asia heat wave kills least 116 people, due to heat-related causes, and at least 22,000 more suffer from heat strokes
20 July: Mamoru Hosoda's Japanese animated film Mirai is released in cinema
26 July: A fire at under constructing technology centre fire in Tama City, Tokyo. According to Fire and Disaster Management Agency confirmed report, total five workers fatalities with 42 injured.[13]
Accident occurs when the roof falls in Tsurumi-ku, Osaka, affective by Typhoon Jebi on 5 September 2018Retired singer, Namie Amuro in 2017
4 September: Typhoon Jebi. Storm surge in Osaka Bay inundated Kansai International Airport and pushed a tanker vessel into the bridge that connects the artificial island to the mainland, damaging it. According to Japan Fire and Disaster Management Agency official report, strong wind and damage around Kansai area resulted in thirteen fatalities and 912 people receiving injuries.[14]
19 November - According to Tokyo District Public Prosecutors Office Special Prosecutors Department official confirmed report, Carlos Ghosn, CEO of Nissan Motor, was arrested by the prosecutor special authority for alleged false statement of the securities report that he declared the compensation inexorably. Ghosn president position and position of representative director of Nissan, succeeded at the Board of Directors on 22 November.[page needed]
23 November - Osaka decide on the venue on Expo 2025 the winner at BIE's 164th General Assembly.[page needed]
26 November - According to Japan National Police Agency confirmed report, six person were murdered, with a suspicion suicide onto Gokase River, in Takachiho, Miyazaki Prefecture.[page needed]
December
26 December - Japan announced that since the International Whaling Commission IWC failed its duty to promote sustainable hunting, which is one of its stated goals, Japan is withdrawing its membership and will resume commercial hunting in its territorial waters and exclusive economic zone from July 2019, but will cease whaling activities in the Antarctic Ocean.[18][19]
27 December - Japan executes two more prisoners, bringing 2018 executions to 15 taking annual total to highest since 2008.[20][21][22]
^札幌市下宿火災（第4報）Archived 2018-03-20 at the Wayback Machine Format:PDF. Fire and Disaster Management Agency of Japan(Japanese Language edition) Retrieved 20 March 2018.
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