Southeast Asia

SHERIDAN, WYOMING - December 26, 2025 - Yokohama Rubber and Thailand's Rubber Authority (RAOT) have reached a new milestone in their long-term partnership to secure sustainable natural rubber, completing their tenth joint seminar to help smallholder farmers in Surat Thani improve rubber quality, productivity and working conditions across the supply chain.

Supporting smallholders at the heart of the rubber supply chain

The latest seminar, held in December 2025, brought together around 50 farming households from the Surat Thani region, one of Thailand's core natural rubber-producing areas and home to Yokohama Rubber's processing subsidiary Y.T. Rubber Co., Ltd. The program focused on practical measures to improve yield and quality at farm level, a critical factor for tire makers who depend on consistent, traceable natural rubber as a key raw material.

SHERIDAN, WYOMING - December 26, 2025 - Yokohama Rubber is deepening its sustainability strategy and raw materials risk management by supporting an international joint research project in Indonesia aimed at preventing rubber tree leaf fall diseases, a growing threat to global natural rubber production and the tire industry's long-term resilience.

Securing Natural Rubber at the Source in Indonesia

The company is cooperating in the multi-year project "Development of Complex Technologies for Prevention and Control of Rubber Tree Leaf Fall Diseases," which targets one of the most serious plant health challenges facing natural rubber plantations in Indonesia, the world's second-largest producer.
Leaf fall disease has become widespread in key growing regions, leading to significant yield losses and jeopardizing supply for industrial users, including tire manufacturers.