Japan was a major global importer and had a diverse range of imported goods and services. Some key import categories for Japan historically include:

• Energy Products: Japan heavily relies on imports of energy resources, such as crude oil, liquefied natural gas (LNG), and coal, as it lacks significant domestic energy reserves.
• Machinery and Equipment: According to Japan import Data the various types of machinery and equipment, including industrial machinery, electrical machinery, and telecommunications equipment, to support its manufacturing and technological industries.
• Electronic Products: Japan is known for its consumer electronics, but it also imports electronic components and semiconductors to fuel its technology-driven economy.
• Automobiles and Auto Parts: Japan imports automobiles and auto parts to meet domestic demand and support its renowned automotive industry.
• Food Products: Japan imports a significant amount of food products, including grains, meat, seafood, and fruits, to supplement its domestic food supply.
• Chemicals: Japan imports chemicals and chemical products for use in various industries, including manufacturing and agriculture.
• Pharmaceuticals: Japan imports pharmaceutical products to meet its healthcare and medical needs.

Please note that the actual import statistics for 2021 may vary, and for the most accurate and up-to-date information, I recommend checking official reports and publications from the Japan Ministry of Finance or the Japan External Trade Organization (JETRO). These organizations regularly publish trade data and can provide more detailed insights into Japan's import trends for 2021.