Japan Initiates Investigation on Steel Imports from South Korea, China, and Taiwan

2026年6月1日

In a significant move for foreign entrepreneurs, Japan’s Ministry of Finance has announced an investigation into the import of hot-rolled steel products from South Korea, China, and specific regions such as Taiwan and the Pescadores Islands. This investigation, initiated under Article 8, Section 5 of the Customs Tariff Act, could lead to changes in tariff regulations that may impact the cost and availability of steel for businesses operating in Japan. Understanding these developments is crucial for foreign business owners engaged in trade or manufacturing in Japan.

📋 Quick Summary for Foreign Business Owners
Category: Regulatory Update

Background & Context

The Japanese government, through the Ministry of Finance (Zaimu-sho), has initiated an investigation concerning the import of hot-rolled steel products from South Korea, China, and specific regions including Taiwan and the Pescadores Islands. This action is based on Article 8, Section 5 of the Customs Tariff Act (Kanzai Taisaku-hō) of 1970, which allows the government to assess the impact of imports on domestic industries. The investigation is part of Japan’s ongoing efforts to protect its domestic steel industry from potential harm due to foreign competition. The timeline for this investigation will typically span several months, during which stakeholders will have opportunities to submit comments and data. The outcome could lead to the imposition of tariffs or other trade measures aimed at regulating the influx of these steel products, which are crucial for various sectors including construction and manufacturing. The last significant amendment to the Customs Tariff Act occurred in 2021, reflecting Japan’s adaptive approach to international trade dynamics.

How This Affects Your Business in Japan

Item	Cost (JPY)	Cost (USD approx)	Notes
Company Registration	¥150,000	$1,000	Includes legal fees
Notary Fee	¥50,000	$350	For document certification
Visa Application	¥4,000	$30	Business Manager visa

1. Foreign Residents Already Operating a Business in Japan
If you are currently importing steel products from the affected regions, it is essential to monitor the investigation closely. You may need to prepare for potential tariff increases or changes in import regulations. It is advisable to consult with a trade lawyer or customs broker to assess your current contracts and supply chains. Failure to adapt could lead to increased costs or supply disruptions.

2. Foreign Nationals Planning to Establish a New Company
For those looking to enter the Japanese market with a focus on steel imports, this investigation may alter your business strategy. Conduct thorough market research to understand the potential impact of tariffs on your pricing and competitiveness. Consider alternative sourcing options or local partnerships to mitigate risks associated with increased costs.

3. Foreign Investors Who Are NOT Residents of Japan
If you are considering investing in Japanese steel-related businesses, be aware that the outcome of this investigation may influence market conditions. Engaging with local experts and monitoring the situation will be crucial. Delaying investment decisions could result in missed opportunities or increased costs if tariffs are imposed.

Step-by-Step: What You Need to Do

Step 1: Stay Informed
Regularly check updates from the Ministry of Finance (Zaimu-sho) regarding the investigation. English support is available on their website.
Office: Ministry of Finance (English Support: Yes)
Cost: Free (¥0)
Time: Ongoing
Pitfall: Missing critical updates

Step 2: Consult with Experts
Engage a customs broker or trade lawyer to understand the implications for your business.
Office: Legal Consultation Services (English Support: Yes)
Cost: ¥50,000 (~$350 USD)
Time: 1-2 weeks
Pitfall: Overlooking legal nuances

Step 3: Assess Supply Chains
Review your current supply agreements and sourcing strategies. Identify potential risks associated with increased tariffs.
Office: Internal Review (English Support: N/A)
Cost: Free (¥0)
Time: 2-3 weeks
Pitfall: Ignoring alternative suppliers

Step 4: Explore Alternatives
Investigate alternative suppliers or local sourcing options to mitigate risks.
Office: Supplier Negotiations (English Support: Limited)
Cost: Variable
Time: 1-2 months
Pitfall: Delayed negotiations

Step 5: Prepare for Changes
If tariffs are imposed, adjust your pricing strategy and communicate changes to your customers.
Office: Internal Strategy Team (English Support: N/A)
Cost: Free (¥0)
Time: 1 month
Pitfall: Poor customer communication

Step 6: Engage with Trade Associations
Join relevant trade associations for updates and support.
Office: Trade Associations (English Support: Yes)
Cost: Membership fees vary
Time: Ongoing
Pitfall: Not leveraging association resources

Step 7: Monitor Legislative Changes
Keep an eye on any legislative changes that may arise from the investigation.
Office: Ministry of Finance (English Support: Yes)
Cost: Free (¥0)
Time: Ongoing
Pitfall: Missing legislative updates

Key Contacts
www.jetro.go.jp/en/
www.moj.go.jp/isa/
www.customs.go.jp/english/
www.nta.go.jp/english/
www.meti.go.jp/english/

Expert Analysis: Japan vs. Regional Competitors

Metric	Japan	Singapore	Hong Kong	South Korea
Incorporation Time	14 days	3 days	5 days	10 days
Minimum Capital Requirement	¥0	$1	$1	₩100,000
Corporate Tax Rate	23.2%	17%	16.5%	22%
Visa Processing Time	2 months	1 month	1 month	1.5 months

What to Expect Next

As the investigation progresses, foreign entrepreneurs should watch for announcements from the Ministry of Finance (Zaimu-sho) regarding the findings and any proposed changes to tariffs. The timeline for the investigation could extend into late 2026, with potential legislative changes following shortly thereafter. Stakeholders should remain proactive in their planning and consider the implications of these developments on their operations in Japan.