Japan's ruling party on Wednesday pushed a nuclear cooperation deal with India through the upper house of parliament, clearing the way for Japanese exports of materials and technology to the South Asian country.

The deal is contentious because India has not signed the Treaty on the Non-Proliferation of Nuclear Weapons, or NPT. […]

India stands to become the first nonsignatory to get access to Japanese nuclear tech. The governing Liberal Democratic Party accounted for most of the "aye" votes in the Diet, or parliament.

Following the approval, the government intends to revise relevant rules under the Nuclear Regulation Authority ‐ Japan's industry watchdog. Once India takes similar steps and the governments exchange documents, the deal will take effect, possibly by this summer.