Political leaders must adhere to the principles of multilateralism despite swirls of anti-globalism and economic uncertainties, experts recommended at a forum in Tokyo ahead of next month's Group of 20 summit in Osaka.

The Think 20, or T20, held for two days through Monday, drew more than 400 think tank experts from Japan and abroad. The group meets annually and submits policy recommendations to G20 member countries in 10 subject areas, such as the environment, global governance and infrastructure investment.

Reflecting recent developments in trade — most notably the clash between the United States and China as both countries ramp up tariffs on imported goods — multiple speakers touched on the topic, sharing their qualms that trade disputes will dampen global economic growth.