Who we are

HQ : Tokyo
Established : 2007
Employees : 149

Aucfan was established in 2007 to operate the platform aucfan.com.
We utilize actual sales data from websites such as Amazon and Yahoo! auction and perform inventory liquidation support service for our clients using our big data.

Every year in Japan, the value of products thrown away before being used amounts to approximately 22 trillion yen.
Even though there is no issue with the quality of these products, we are forced to dispose of them because of the imminent expiration date or because they are outdated due to package changes (seasonal packages etc.). Companies are aware of the waste it leads to, but they are also concerned about brand damage and price drop.

Aucfan is taking on the challenge of eliminating this waste of 22 trillion yen by using the transaction data we have been accumulating over the past 10 years. “Ensuring sustainable consumption and production patterns” is the 12th SDGs goal adopted at the United Nations Summit in 2015, as the world is becoming increasingly aware of the responsibility one carries when producing or using a product. We must maintain the necessary amount of production, and deliver the right things to the right places.

We believe that if we can make the market value of dormant (sleeping) goods more visible, to make them accessible to people who need them, we could make buyers and sellers the happiest in the world, and save these goods from being thrown away.
We continue to challenge ourselves to get dormant value to places where people need it, to make it shine once again.

To implement that, we offer a variety of services, such as AI products suggesting the “market value” of goods for retailers and manufacturers who are struggling with inventory management, market information services for individuals who are trading goods as a side hustle, as well as tools to improve business efficiency.
If you join our team, you will take part to the development and maintenance of these services and tools.

Our vision


The word “RE” means “again”.
Instead of creating something from scratch, it carries the meaning of recapturing what is already out there in the world, combining it and reconfiguring it in a better way.

Aucfan group is committed to addressing social issues through the integration of various “RE” projects, aiming to be a company that builds one-of-a-kind infrastructures.

Our services/products

Media Business
Service offering market price and prices comparison for auctions and web shopping. We also provide “aucfan Premium,” which allows users to check prices over the past 10 years, and “aucfan Pro Plus,” a research tool for online sales and retailing.

Marketplace Business

    The largest B to B wholesale platform in Japan, with an annual distribution value of approximately 8 billion yen and 400,000 registered buyers.
  • ReValue
    Liquidation services for excess inventory and returned stock.

Solution Business
A centralized management tool for online store management we have been running for over 10 years.
It provides functions necessary for store operations such as listing, inventory coordination, and sales coordination.


Our engineering team

What projects/services is your engineering team working on?

We develop all our services in-house, including those of our subsidiaries.
We are responsible for all development and operational projects.

What technologies are you using?

We use a variety of web-related technologies.
A well-designed architecture is at the cornerstone of our work, we believe it is essential to handle large amounts of data efficiently.

Development environment

  • OS: Linux (CentOS/Amazon Linux)
  • Cloud: AWS (EC2,S3,Route53,RDS,CloudFront,CloudWatch,Lambda,CloudFormation), Azure
  • DB: MySQL, PostgreSQL, Redis etc.
  • Middleware:Apache/nginx, Elasticsearch, Chef, Kubernetes, Zabbix etc.
  • Deployment tools: GitHub, Jenkins
  • Communication tools: Gmail, Slack, Kibela, Redmine, Trello, Backlog
  • Hardware: DELL, HP, NEC, Cisco, Allied telesis, FortiGate etc.

What type of engineers work at your company? What is their job content?

There are web front-end engineers, back-end engineers, and infrastructure engineers.
Depending on the service, the same position may cover different areas of responsibility, but all of our engineers basically develop and operate systems.

Do you plan on using any new technologies in the future?

Business comes first, we implement any technology needed to achieve it.

Our corporate culture

Our company is in the middle of its growth process, therefore decision making process must be very quick.
Speedy implementation for what our customers need and delivering results is highly valued within the company.

We are looking for people who

  • always think ahead of their times
  • are willing to change
  • are eager to grow
  • have a thing for numbers
  • can think rationally
  • can take advantage of their own strengths and those of people around them
  • know how to turn the strong points of their colleagues into strengths
  • are sincere

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