Multi-colour shirt leader Tul Srisomwong submitted a letter at the Japanese Embassy in Bangkok this morning, opposing the special entry permit given to former prime minister Thaksin Shinawatra.
"I want justice-loving Japanese people to question the move by their government," he said.
Tul said Thaksin is a fugitive and that his donations for tsunami victims are ill-gotten gains, or dirty money accumulated by corruption. His letter will attach a high court's verdict on the Thaksin assets seizure case, he added.
He said he would closely monitor next week's policy debate in order to determine whether the government was gearing up to help Thaksin elude the law.
"The government should be focusing on extraditing the fugitive (Thaksin) instead of helping him to gain entry to another country," he said.
Japan has granted special entry permission to Thaksin following a personal request made by Thailand's government of which Yingluck, the younger sister of Thaksin, is prime minister.
Japan said that in the light of the request from the Thai government and various related considerations, it had decided to issue a visa.
Bangkok urged the approval of Thaksin's visa, saying that it would help improve bilateral ties between both nations and be of benefit to the victims of the March double disasters, Edano said.
