I can provide:
1. Information (name and URL) of Japan based company that offers business matching service with foreign companies.
This company can help you find Japanese importer / retailer matching your business.
(I am assuming the situation where foreign company is planning to enter Japanese market.)
2. URL of a website where sellers / exporters (in overseas) who wish to sell / export their products (to Japan) post information about their products in order to find prospective buyers / importers / retailers (in Japan) seeking to buy / import products from foreign companies.
3. URL of a website where Japanese wholesalers / exporters who wish to wholesale / export their products (to overseas) post information about their products in order to find prospective buyers / importers / retailers in overseas seeking to buy /import products from Japanese companies.