Rengo to raise paperboard and converted paper prices from January 2027

Rengo, Japan's largest corrugated board maker, said on 13 October 2026 it will raise prices for paperboard, corrugated board and converted paper products by 10% or more from deliveries on 1 January 2027. The company cited cost increases from global inflation, higher interest rates and Middle East tensions that it says can no longer be absorbed internally. Specific terms will be set individually with each customer.

Why this mattersA double-digit increase from Japan's leading corrugated producer raises packaging input costs for e-commerce and other box users across the market.

• Rengo announced the increase on 13 October 2026
• Price rise applies to paperboard, corrugated board, corrugated boxes and kraft pulp products
• Increase is 10% or more on current prices
• Takes effect for deliveries from 1 January 2027
• Rengo previously requested a price revision from customers in July 2025
• Exact terms will be set per customer based on trading conditions

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