www.mlit.go.jp/jidosha/jidosha_fr1_000035.html

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自動車：ＤＰＦ（黒煙除去フィルタ）等の正しい使用方法について - 国土交通省

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http://www.mlit.go.jp/jidosha/jidosha_fr1_000035.html

About this page

This page provides information from Japan's Ministry of Land, Infrastructure, Transport and Tourism about proper use of DPF (Diesel Particulate Filter) systems in diesel vehicles. Issues such as extended idling time and engine shutdowns occur when vehicles operate at low speeds without manual regeneration, causing particulate matter accumulation. The Japan Truck Association and four major manufacturers (Isuzu, Hino, Mitsubishi Fuso, UD Trucks) collaborated to compile usage guidelines and precautions. The page includes links to manufacturer resources and contact information for customer inquiries regarding proper DPF operation.