Japanese packaging producer Rengo announced a price revision on October 13 for products in its board and paper-converting business. The stated starting point is deliveries from January 1, 2027, at 10% or more above current prices. This is not a statement that every customer’s invoice has already risen by a uniform rate. Rengo says it will present revisions individually, taking trading conditions and previous price adjustments into account.
A business-segment announcement, with product examples
Rengo’s original release in PDF identifies five group segments and places this revision in its board and paper-converting business. It separately discusses earlier responses to cost rises in the flexible- and heavy-duty-packaging segments. The announced date and percentage should not simply be extended to all those other businesses.
A Nikkei report from October 13 describes affected products as including corrugated products, corrugated base paper and paper packaging products (shiki, 紙器). Those are the newspaper’s more concrete examples of the segment in Rengo’s release. Neither source supplies an item-by-item price schedule proving that every grade, specification and box design will receive exactly the same increase.
Check the delivery date and the customer-specific notice
The operative date is a delivery date, not the announcement date. For a given purchase, a buyer needs the product specification, existing price, delivery schedule, previous adjustment history and the revised quotation. These are editorial checks for a buyer, not blanket contractual terms published by Rengo. The company has not issued a single customer-by-customer schedule in the cited release, nor does it specify a uniform treatment of every existing order.
Rengo says it asked customers in July 2025 to bear cost increases accumulated through June of that year. It attributes continuing increases since then to global inflation, higher interest rates and the prolonged impact of Middle East tensions, among other factors. Those are the company’s stated reasons; the release does not disclose a verified cost increase or margin outcome for every individual grade.
The supported news is a forward-looking price-revision request covering Rengo’s board and paper-converting business. It does not establish a 10%-plus increase in Korean containerboard or box prices. Any effect on a Korean buyer or seller needs its own quotation and contract evidence.
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PackingMaster is the PaperPackLog editor, covering paper packaging markets, products, and technical questions.