Nikkei 225 took a giant leap in morning trading and was after lunch up by more than 4.5 percent. The increase coincides with the election of Sanae Takaichi, who over the weekend was appointed new chairman of Japan's ruling party, the Liberal Democratic Party (LDP).
Takaichi is described as stimulus-friendly and is expected to take over as the country's prime minister, writes CNBC and other media.
Several Japanese stocks are increasing significantly on Monday. Among other things, the technology and industrial stocks Kawasaki and Mitsubishi Heavy Industries are doing well, both up by over ten percent.
Chinese exchanges in Shenzhen and Shanghai, as well as the South Korean Kospi, are all closed due to a public holiday. The Hang Seng index in Hong Kong is falling by up to one percent.
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