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Plus One LLC（合同会社プラスワン） is a web marketing service provider based in Tokyo, Japan. Its services cover managed listing ads, web consulting, in-house operations support, web production, and media business. Rather than positioning itself as a simple advertising agency, it presents itself as a marketing partner focused on improving CPA/KPI performance and increasing website customer acquisition.
For managed ad operations, its services include initial account setup, keyword and ad copy creation, negative keyword configuration, bid adjustments, A/B testing, measurement tag setup, result reports about once or twice per week, and website improvement suggestions based on campaign results. It emphasizes that even as automation becomes more prevalent, search advertising still requires detailed manual management. Its web consulting is based on access analytics reports and includes issue analysis, SEO consulting, user experience and sales improvement recommendations, and participation in meetings with internal teams or external vendors to help drive implementation. Its in-house support is aimed at companies that want to operate ads on their own, offering account opening, initial design, tag implementation, training, and individual consulting.
Pricing is relatively clear: the initial fee for managed ad operations is 0 yen, with a service fee of 20% of ad spend, subject to a minimum of 100,000 yen per month excluding tax. Web consulting and in-house support both start from 100,000 yen per month excluding tax. Second opinions start from a minimum of 50,000 yen excluding tax. The minimum contract period is three months, after which contracts renew automatically on a monthly basis. Weekly on-site office support has eligibility requirements: an ad budget of at least 1 million yen, or monthly consulting/in-house support fees of at least 200,000 yen.
The advantages include a high level of account transparency: campaigns can be operated using the advertiser’s own account, and even agency accounts can be granted viewing access, helping prevent the loss of data assets. It supports instant communication tools such as Chatwork, Slack, LINE, and Facebook Messenger, and holds meetings at least once per month. The drawbacks are that the official website does not disclose specific client cases, industry coverage, or quantified results. Its service language and delivery model are clearly geared toward the Japanese domestic market, and even small-budget companies must bear the minimum monthly service fee of 100,000 yen.
It is suitable for companies running search ads in the Japanese market, businesses facing worsening CPA, and those dissatisfied with the transparency or responsiveness of their current agency. It is also a good fit for teams preparing to bring ad operations in-house and needing training plus hands-on support from an external consultant.
The text does not provide information on access from mainland China, ICP filing, nodes, or availability, so this is considered unknown.
⚠ This review is compiled from public sources and does not constitute a purchase recommendation. Verify all facts on the vendor's official site. Verify on p-one.jp official site.
p-one.jp is an Japan Marketing & SEO provider. TG4G tracks its product information, an overall rating of 6.0/10, and a China-accessibility score of Limited (proxy recommended). Click "Visit Official Site" to reach p-one.jp directly.