With a wide variety of imported goods and services, Japan was a significant global importer. Historical examples of significant import categories for Japan include:

Energy Products: Because it lacks large local energy reserves, Japan mainly depends on imports of energy resources such crude oil, liquefied natural gas (LNG), and coal.

Machinery and Equipment: The many kinds of machinery and equipment, such as industrial machinery, electrical machinery, and telecommunications equipment, are imported into Japan, according to import data, to support its manufacturing and technology industries.

To complement its local food supply, Japan imports a sizable amount of food items, including cereals, pork, seafood, and fruits.

Chemicals: Japan imports chemicals and chemical-related goods for use in manufacturing and agriculture, among other sectors.

Pharmaceuticals: To address its healthcare and medical needs, Japan imports pharmaceutical items.

Please be aware that the actual Japan import data for 2023 may differ, and I suggest reading official reports and publications from the Japan Ministry of Finance or the Japan External Trade Organisation (JETRO) for the most current and correct information. These organisations can offer more thorough insights into Japan's import trends for 2021 as they frequently disclose trade data.