Treasury Secretary James A. Baker III will leave for Tokyo Wednesday to attend the meeting of finance ministers of the Group of 10 industrial nations, taking along four senior staff members, papers on monetary policy and probably his jogging shorts.

In addition to his hobby of hunting turkeys, Baker is an avid jogger. Aides say he tries to run about two miles a day. He even managed to find time to run in Bonn last month when attending the European economic summit.

Baker will be accompanied by David C. Mulford, assistant secretary for international affairs, Kim Hoggard, deputy assistant secretary for public affairs, Charles H. Dallara, senior deputy assistant secretary for international affairs, and Barry Newman, director of the office of international monetary policy.

The ministers are expected to study ways to stabilize international exchange rates. Baker is to return June 22 to continue pushing President Reagan's tax-revision plan. DRUG ENFORCEMENT

Baker also wants to increase his agency's efforts to curb drug trafficking. Baker said last week that he plans to increase the resources of the U.S. Customs Service, the Internal Revenue Service and the Bureau of Alcohol, Tobacco and Firearms.

Last year, Customs seized more than 27,000 pounds of cocaine, nearly six times the amount taken in 1980, the Treasury said.

"With all the public attention that has recently been focused on comprehensive tax reform, it is important that we not overlook that the Treasury Department is also deeply committed to reducing drug abuse in this country," Baker said. "We view these additional resources as evidence of our strong commitment." CHINA TIES

Soon after Baker returns from Japan, he will host three days of meetings of the U.S.-China Joint Economic Committee in Washington. The participants are expected to discuss U.S.-China trade and finance issues. Last year then-Treasury Secretary Donald T. Regan attended the meeting in Peking.

Trade between the countries reached a record $6.4 billion last year and equity investments in China by U.S. firms last year were $700 million. U.S. officials would like to increase those numbers, a Treasury spokesman said. America leads all countries in equity joint ventures with China. CHANGING CASH

U.S. Treasurer Katherine D. Ortega and Robert J. Leuver, director of the Bureau of Engraving and Printing, will testify Tuesday before the House Banking, Finance and Urban Affairs subcommittee on consumer affairs and coinage, on legislation that would require that Congress approve any change in U.S. currency. Currently, the Treasury Secretary has the right to change the design of U.S. money. However, there have been no changes since 1929, when dollar bills were shrunk to their present size.

The Treasury has been studying ways of discouraging the counterfeiting of U.S. currency by changing its color, adding a magnetic strip through bills or placing a hologram on them. No decision has been made, although it is expected that some of the proposals will be discussed at the hearing. NEW FACE

The department has a new general counsel: Robert Kimmitt, who was deputy assistant to the president for national security affairs.