Japan today imposed sanctions against Iran over its contentious nuclear programme in line with a UN resolution and said it plans to announce additional punitive measures later this month. The cabinet of Prime Minister Naoto Kan announced the steps as the US State Department's special adviser for non-proliferation and arms control Robert Einhorn was headed for Tokyo as part of an East Asian tour. The measures include an asset freeze on 40 Iranian entities and one individual suspected of being involved in nuclear and missile development. The UN Security Council in June slapped its fourth set of sanctions on Iran over its refusal to halt its uranium enrichment work, part of a nuclear programme which many nations fear masks a drive for nuclear weapons. The United States, European Union, Canada and Australia have also earlier announced additional sanctions, which have been opposed by Russia and China.