Xia Hong-bo, 35, was on duty when the 2,962-tonne Jia Hui collided with the 498-tonne Eifuku Maru No. 18 on Friday, the official said.
The bodies of five of those aboard the smaller vessel have been recovered. A sixth man is still missing, a coastguard official said.
Xia has been questioned on suspicion of professional negligence over the pre-dawn accident, which occurred in waters off Japan's Izuoshima island, around 100 kilometres south of Tokyo.
The Japanese ship capsized following the accident, while the 2,962-tonne Sierra Leone-registered cargo vessel was unaffected.
You’ve reached your limit of {{free_limit}} free articles this month.
Subscribe now for unlimited access.
Already subscribed? Log in
Subscribe to read the full story →
Smart Quarterly
₹900
3 Months
₹300/Month
Smart Essential
₹2,700
1 Year
₹225/Month
Super Saver
₹3,900
2 Years
₹162/Month
Renews automatically, cancel anytime
Here’s what’s included in our digital subscription plans
Exclusive premium stories online
Over 30 premium stories daily, handpicked by our editors


Complimentary Access to The New York Times
News, Games, Cooking, Audio, Wirecutter & The Athletic
Business Standard Epaper
Digital replica of our daily newspaper — with options to read, save, and share


Curated Newsletters
Insights on markets, finance, politics, tech, and more delivered to your inbox
Market Analysis & Investment Insights
In-depth market analysis & insights with access to The Smart Investor


Archives
Repository of articles and publications dating back to 1997
Ad-free Reading
Uninterrupted reading experience with no advertisements


Seamless Access Across All Devices
Access Business Standard across devices — mobile, tablet, or PC, via web or app
