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China’s Exports of HS Code 87149310 to Japan (2015–2025)
Product note: HS code 87149310 refers to bicycle hubs, freewheels, and chain-wheel/driving components – essential parts of a bicycle’s drivetrain.
1. Data Overview
Key turning points:
- 2019: sharp collapse (–48%)
- 2020: explosive growth (+178%)
- 2021–2022: stabilisation at a lower level
- 2023–2025: three consecutive years of steep decline, with 2025 reaching only 12% of the 2020 peak
2. Root Cause Analysis by Period
2019 – The Collapse (–48%)
- Japan’s consumption tax hike – The increase from 8% to 10% (October 2019) triggered front-loading of imports in late 2018 and early 2019. The second half of 2019 saw a severe demand vacuum.
- US-China trade war spillover – Tariff uncertainty disrupted global supply chains. Japanese buyers began diversifying to Taiwan, Vietnam, and other Asian suppliers.
- China’s environmental crackdown – The “Blue Sky Defence” campaign forced many hub and casting factories in Hebei and Shandong to cut production, raising costs and delaying deliveries.
2020 – The Explosive Surge (+178%)
- COVID-19 bicycle boom – Fear of public transport and government subsidies (e.g., bicycle purchase support) caused a massive spike in Japanese bicycle demand.
- China as the sole reliable supplier – While other manufacturing hubs shut down, China’s factories reopened early, making it the only stable source for hubs and freewheels.
- Indoor cycling trend – Home trainers and smart trainers (requiring hubs and freewheels) saw global demand skyrocket.
- USD/JPY exchange rate – The US dollar weakened from 109 to 103 yen in 2020, inflating the dollar-denominated export value.
2021–2022 – Normalisation but Not a Return to Pre-COVID Levels
Post-boom demand softened, but global shipping congestion forced some buyers to use expensive air freight, propping up order values.
COVID-related factory closures in Vietnam and Cambodia (2021) redirected orders back to China.
The 2022 energy crisis and Russia-Ukraine war drove up aluminium and steel prices, raising unit prices and offsetting some volume decline.
2023–2025 – Structural and Cyclical Collapse (–87% from 2020)
A multi-layered, irreversible shift:
Table of Contents
(1) Shrinking Japanese demand
- Aging population – Over 29% of Japanese are aged 65+. Bicycle commuting is declining, replaced by mobility scooters and compact four-wheelers.
- Shared bicycles – Services like Docomo Bike Share reduce the need for private bicycle ownership and spare parts.
- Electric-assist bicycles – Growing adoption of e-bikes (with integrated motor hubs) displaces traditional mechanical hubs.
(2) Supply chain relocation
- RCEP effect – Tariffs on bicycle parts from China and ASEAN have gradually fallen, but lower labour costs in Vietnam and Thailand are pulling Japanese procurement away from China.
- Japan’s “de-risking” strategy – Government subsidies (METI’s supply chain diversification programme) encourage shifting sourcing to India, Bangladesh, and ASEAN.
- Rising costs in China – Labour, environmental compliance, and land prices have made low-margin hub production less competitive.
(3) Exchange rate and macroeconomic headwinds
- Historic yen depreciation – The yen fell over 30% against the dollar from 2022 to 2024, briefly exceeding 160 yen/USD. Japanese importers saw their local-currency costs double, forcing them to slash orders or renegotiate prices sharply downward.
- Japan’s sluggish economy – Real GDP growth remained below 1% in 2023–2024, and inflation ate into disposable income. Bicycle upgrades became a low priority.
(4) Technological substitution
- Belt and shaft drives – Growing popularity of maintenance-free drivetrains reduces demand for traditional chain-based hubs and freewheels.
- Internally geared hubs – Shimano’s Inter-8 and similar products (often made in Japan or higher-tier suppliers) are replacing conventional freewheel hubs, squeezing Chinese exporters.
(5) The 2025 cliff dive (–61%)
- New Japanese environmental regulation – The “Bicycle Parts Hazardous Substances Restriction Order” took effect in 2025. Many smaller Chinese producers failed to meet the standards and lost export eligibility.
- Capacity shift to other markets – China’s booming e-bike export sector (especially to Europe and the US) diverted production lines away from traditional hubs for Japan.
- Inventory destocking – The huge 2020–2021 shipments left Japanese importers with bloated inventories, which they spent 2023–2025 clearing. New orders have been minimal.
3. Above all
Fundamental verdict:
The golden era for Chinese exports of HS 87149310 to Japan peaked in 2020 and has entered an irreversible structural decline. Demographic shrinkage in Japan, deliberate supply-chain diversification away from China, technological substitution, and extreme currency volatility have reduced 2025 exports to just 12% of the 2020 level.
Unless Chinese manufacturers rapidly pivot to high-value products – such as e-bike hub motors, intelligent freewheels, or integrated drive systems – this product category will likely remain at very low levels for the foreseeable future.
If you need a strategic follow-up – e.g., product mix recommendations or alternative market options (Southeast Asia, Middle East) – please let me know.



