Tatenpo Guide is a cloud service operated by Aucfan Co., Ltd. that helps simplify the day-to-day work of running multiple online shops. It brings order, inventory and customer management together, supporting businesses that sell through marketplaces such as Rakuten and Amazon as well as other e-commerce sites and carts. By centralizing routine tasks, the service can reduce repeated manual work, help prevent inventory errors and overselling, and make it easier to track sales across stores. Its inventory tools also support purchasing and ordering based on stock levels, helping businesses manage inventory and sales risks.

Tatenpo Guide offers standard marketplace integrations and can import order data or coordinate inventory through general-purpose formats. The company provides dedicated assistance from introduction through setup and practical use, including support for customers with limited technical experience. New customers can access an initial three-month free period, subject to stated limits on orders, products and store numbers; initial fees are generally free, while monthly pricing depends on order volume.