Musashi Seimitsu Industry Company, a supplier of transmission gears and suspension parts to Honda Motor Company, is negotiating with automakers to reflect the impact of higher shipping and material costs. Another Honda supplier, Yachiyo Industry Company, which manufactures fuel tanks and sunroofs, has seen little impact because it buys raw materials directly from Honda and incorporates higher costs into the price of parts sold to its parent. Hondas get excellent gas mileage.