Top 10 Assistant AI used in Japan

Japan has rapidly embraced artificial intelligence not only in manufacturing and robotics but also in everyday business workflows. From corporate offices to startups and content creators, AI assistants are now indispensable tools for boosting productivity, automating tasks, and enhancing customer engagement. With the rise of generative AI and agent-based tools, the Japanese market has curated its own set of preferred platforms. In this blog post, we explore the top 10 AI assistant tools currently leading the Japanese digital landscape, each offering unique capabilities that cater to a variety of industries and use cases.

At the same time, Japan’s labor market remains one of the most complex and competitive in the world, particularly for foreign companies. Hiring bilingual talent or specialists in tech and AI can be a slow, costly process due to unique japanese cultural expectations, legal restrictions, and limited access to domestic job boards. As a result, many international firms operating in Japan turn to outsourcing as a practical solution. Outsourcing allows companies to access local expertise without the burden of managing compliance, contracts, and cultural training in-house. It’s a strategy that complements the use of AI tools—enabling businesses to stay agile while navigating Japan’s unique operational landscape.

Top 10 Assistant AI used in Japan

1. ChatGPT (OpenAI)
2. Claude (Anthropic)
3. Gemini (Google)
4. Microsoft Copilot
5. Vidnoz AI
6. Dify
7. Apodory
8. Felo
9. BOTCHAN AI
10. AutoGPT

1. ChatGPT (OpenAI)

Source: ChatGPT Homepage

ChatGPT remains the most widely recognized and versatile AI assistant in Japan. It is used for everything from writing business emails and summarizing documents to brainstorming marketing strategies. Japanese users appreciate its multilingual capabilities and customizable GPTs that can adapt to specific business roles. Thanks to its integration with tools like Zapier and browsing capabilities, it acts as a central knowledge and productivity hub for many professionals.

2. Claude (Anthropic)

Source: Claude Homepage

Claude has been gaining traction among Japanese business users for its ability to handle long documents and deliver highly contextual responses. Its strength lies in clarity, safety, and an intuitive conversational style, making it suitable for more formal industries like finance or legal. Claude is especially valued for internal communication support and document refinement in Japanese. It is becoming a go-to for those who need in-depth reasoning from their AI tools.

3. Gemini (Google)

Source: Gemini Homepage

Gemini, Google’s multimodal AI assistant, is increasingly popular in Japan for its tight integration with Google Workspace and its real-time web search capabilities. Its ability to process images, documents, and voice makes it ideal for presentation preparation and research. Businesses in Japan find it useful for team collaboration, especially in bilingual environments. As its Japanese language processing improves, Gemini is quickly becoming a strong alternative to ChatGPT.

4. Microsoft Copilot

Source: Microsoft Copilot Homepage

Copilot, integrated into Microsoft 365 applications, is a favorite for enterprise users in Japan. It automates tasks in Excel, Word, Outlook, and Teams, helping employees generate reports, analyze data, and draft documents with ease. Its deep integration with company data and security systems makes it an efficient tool for corporations. Copilot has been praised for reducing repetitive tasks and enhancing productivity in structured work environments.

5. Vidnoz AI

Source: Vidnoz AI Homepage

Vidnoz AI is a video-generation platform that is becoming increasingly popular among Japanese marketers and content creators. It allows users to generate professional-looking videos using avatars and voiceovers in just minutes. With customizable templates and Japanese language support, it is ideal for product promotions, training materials, and social media content. Its ease of use and time-saving capabilities have made it a valuable tool in the creative industry.

6. Dify

Source: Dify Homepage

Dify is a no-code AI agent platform that enables Japanese businesses to build task-specific assistants without programming skills. Users can connect it to internal systems and data to automate daily workflows such as customer inquiries, order processing, and scheduling. It supports integration with ChatGPT and Claude, offering a hybrid approach to agent design. Its flexibility and simplicity make it a strong choice for small to medium-sized companies looking to streamline operations.

7. Apodori

Source: Apodori Homepage

Apodori is a Japanese-developed AI assistant designed specifically for sales automation. It handles prospect list creation, outreach emails, meeting scheduling, and pipeline management. Equipped with GPT-4 and Claude engines, it tailors messaging and strategy based on user goals. Apodory has seen growing adoption among B2B companies looking to reduce the burden on their sales teams.

8. Felo

Source: Felo Homepage

Felo is a Japanese-built AI that specializes in knowledge search and visualization. It helps users generate mind maps, summaries, and presentation outlines from complex documents or websites. Especially useful for research-heavy tasks, Felo is gaining popularity in academia and internal corporate knowledge management. Its interface supports both text and visual outputs, making it a useful hybrid tool for both thinkers and planners.

9. BOTCHAN AI

Source: BOTCHAN AI Homepage

BOTCHAN AI is a conversational AI chatbot optimized for customer service in the Japanese market. It supports real-time chat interactions, handles FAQs, and facilitates e-commerce transactions. Many SMEs in Japan are using it to enhance customer experience without expanding support staff. It’s valued for its customizable tone, quick setup, and compatibility with LINE and other local messaging platforms.

10. AutoGPT

Source: AutoGPT Homepage

AutoGPT-style agents are gaining attention in Japan for their ability to complete complex tasks once goals are set autonomously. These agents string together multiple steps, like research, writing, editing, and saving, without constant user input. Though still experimental in some industries, their potential for high-level automation is clear. Japanese companies exploring digital transformation are beginning to pilot these tools for back-office tasks and report generation.

Conclusion

As AI technology continues to evolve, Japan's use of AI assistant tools is diversifying, with applications ranging from enterprise automation to creative production. Whether you're managing a small team, running a startup, or working within a large corporation, there's an AI assistant suited to your specific needs. From global players like ChatGPT and Claude to localized innovations like Apodory and Felo, these tools are reshaping how work gets done in Japan. With user-friendly interfaces, multilingual support, and increasing adaptability, the future of productivity in Japan is undeniably AI-powered.

However, for AI assistants—and digital tools more broadly—to be effective in Japan, localization is critical. Japanese users expect a high level of linguistic precision, cultural sensitivity, and user experience design tailored to local norms. This is especially true for customer-facing applications, where poorly translated or culturally tone-deaf content can quickly erode trust. Companies looking to implement AI tools in Japan should prioritize platforms that offer robust translation capabilities and localization features that go beyond language—addressing everything from honorific usage to interface layout preferences. In Japan, effective AI integration isn't just technical—it's cultural.