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In May 1956, a four-man Indian team (known as the Shah Nawaz Committee) visited Japan to probe the circumstances of Bose's alleged death. The Indian government did not then request assistance from the government of Taiwan in the matter, citing their lack of diplomatic relations with Taiwan.
However, the Inquiry Commission under Justice Mukherjee, which investigated the Bose disappearance mystery in the period 1999-2005, did approach the Taiwanese government and obtained information from the Taiwan Government that no plane carrying Bose had ever crashed in Taipei. The Mukherjee Commission also received a report originating from the US State Department, supporting the claim of the Taiwan Government that no such air crash took place during that time frame.
The Mukherjee Commission submitted its report to the Indian Government on November 8, 2005. The report was tabled in Parliament on May 17, 2006. The probe said in its report that Bose did not die in the plane crash and the ashes at Renkoji temple are not his. However, the Indian Government rejected the findings of the Commission.
One more alleged report on Netaji's death is that he died on a plane crash in the hills of Manipur. Although, it has not been proved so.
Also, a recent article on Times Of India stated an old man who said he was netaji before he died.
All these alleged reports are nothing more than twisting of a story as times pass by(As I feel).