If it's about drainage channels, leave it to Chiba Ceramics! Many listings including field drainage boxes!
The "Sakku Drainage Product Catalog" is a catalog from Chiba Ceramics Co., Ltd., which manufactures and sells various precast concrete products, including box culverts, Hume pipes, joint trenches, L-shaped retaining walls, drainage products, and road products, as well as providing design and construction services.
It features products such as the "Chiba Prefecture Type B Drainage," "S-Type Assembly Box for Water Channels," and "Ibaraki Prefecture Type B Drainage."
[Featured Products]
■ Chiba Prefecture Type B Drainage
■ Field Drainage Box
■ Ibaraki Prefecture Type B Drainage
■ Drop Water Box
■ B Type Drainage
*For more details, please refer to the PDF document or feel free to contact us.