Best Email Management Software in Japan

Email, meet AI. Canary can write your emails, prioritize what needs attention, silence spam & much more. Say hello to your Inbox Copilot!

Hiver is a Gmail-centric customer service solution that helps teams across the organization collaborate on shared inboxes like services@, orders@, support@. It’s the most frictionless, natural way for teams to handle customer email communication as it works right inside Gmail. It helps customer-facing teams collaborate better and make sure all queries are answered on time, by the right people. Hiver helps over 1500 companies - ranging from new-age unicorns to traditional enterprises - deliver a better experience to their customers. Companies like Canva, Lonely Planet, Flexport, Pluralsight, Oxford Business Group, and Upwork, among others, are powered by Hiver.

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Anyone who gets a lot of email and needs to stay up to date. We envisage the typical usage to be for business people, who want their work email read to them during their drive to and from work. We think anyone who takes responsibility for their own work time will like it, such as people in leadership or management roles. Executives, self employed people, marketers, journalists, politicians, account managers, team leaders, lawyers, accountants, doctors, engineers, consultants, sales people on the road all day... lots of people who use email as a primary tool. Inbox zero enthusiasts will particularly like the chance to use downtime to prune their inbox. Control using voice, gestures or buttons. Reads only the content without the clutter. Speaking Email reads your latest emails out loud from your inbox, one by one. Email reading is different to general text-to-speech. Emails are littered with signatures, disclaimers and thread headers.

one.email is an AI-powered email client designed to streamline your inbox by connecting multiple email accounts and organizing them with smart categorization and powerful search capabilities. It allows users to save hours each week by turning email chaos into clarity, offering features like automatic email classification, unlimited email storage, and a unified calendar. It emphasizes user privacy, ensuring no ads or tracking, and provides premium support. one.email is compatible with IMAP, SMTP, Google/Gmail, and Outlook accounts, making it a versatile solution for managing various email services in one place.

Harmony AI Email Assistant is a voice-powered Gmail manager that transforms your inbox into a hands-free, eyes-free experience, ideal for multitasking or accessibility needs. It reads new messages aloud with natural, thread-aware summaries and lets you perform actions, reply, archive, delete (single or batch), star, mark unread, move to labels or folders, and unsubscribe from newsletters, using simple voice commands as you would with an assistant. You can compose and send new emails entirely by voice, draft replies in real-time, and request smart summaries of lengthy threads. Designed with a privacy-first architecture, Harmony never stores your email content, uses end-to-end encryption, asks for confirmation before sending or deleting, and ensures recoverable actions so mistakes aren’t permanent. Harmony integrates seamlessly with Gmail, providing adaptive AI voices, customizable wake words, and secure OAuth authentication.

Cora is an AI-assistant for managing your Gmail inbox that acts like a chief of staff, screening your incoming emails, prioritizing what’s important, drafting replies in your own style, and sending you brief summaries of everything else. It learns your email habits and communication voice, lets you adjust its behaviour via natural chat or settings, and helps keep your inbox zero. Twice a day, it sends a “Brief” summarizing non-urgent messages (newsletters, notifications, FYIs) so you can skim instead of wading through hundreds of emails. You always retain control, Cora doesn’t send or delete emails itself, drafts appear for you to review before sending. It promises strong privacy; your data isn’t used to train external models, there’s no back-door access to your mail, and the product meets standards like Google Verification, CASA Tier 2, GDPR, and ISO 27001.

The Email Assistant turns your inbox into a more actionable space by handling organization, replies, meeting scheduling, and prioritization automatically. It organizes emails by tagging them (e.g., what needs a reply vs what’s informational) to help you maintain “inbox zero.” It composes responses; AI-drafts are generated automatically, matching your tone and style. For scheduling, the Assistant manages the back-and-forth of arranging meetings and places them on your calendar without requiring extra effort. It also helps you search through your email, delivering summaries of meetings, key emails, and daily priorities so you can start your day informed. Underpinning all this is a focus on security and privacy. Supported integrations include Gmail and Outlook.

MailAI is an AI-powered email-automation platform that deploys personal AI agents that run 24/7 in secure, isolated sandboxes to manage, respond to, and automate workflows in your inbox and calendar. Your agent can auto-respond to customer inquiries, monitor invoices via Stripe, coordinate meeting schedules, generate daily summaries of unread emails, and carry out custom tasks, all triggered by simple plain-English instructions. Built for enterprise-grade data security, MailAI integrates deeply with tools like Gmail, Google Calendar, and Stripe, and supports conversational interaction where you can ask your agent to “find all emails from Sarah about the Q4 deadline” or “schedule a check-in meeting and send the invite.” The system includes powerful features like inbox management, invoice and task tracking, email templates, performance-based workflows, and built-in compliance protections (CASA-verified sandboxes, encryption, GDPR/CCPA support).

Auto-segmentation, smart filtering, AI auto-complete, and built-in CRM. Stop wasting time on repetitive tasks. Manage contacts with custom properties. Adapt to any scenario, from sales to marketing and recruitment. Simplify your email experience with Taurin. This tool organizes your inbox, provides summaries, and enriches your contact database. With Taurin’s autonomous features, you’ll spend less time managing emails and more time building meaningful connections. Email isn't going anywhere, but how we handle it needs to evolve. With remote work becoming the norm and digital communication exploding, we need smarter tools to manage our interactions. Taurin isn't just another email client, it's your personal email intelligence partner. Smart AI that intelligently organizes your emails. Rich contact insights that give you the full picture. Lightning-fast AI writing assistant with auto-summarize and auto-complete. Built-in CRM to keep all your relationships organized.

Forage is an AI-powered email assistant designed to declutter your inbox without requiring you to learn a new application. It seamlessly integrates with your existing Gmail account, filtering out low-priority emails and delivering a clean, daily summary that includes concise TLDRs of each newsletter. This approach ensures that your primary inbox remains focused on essential communications, while still keeping you informed about other content. Forage adapts to your preferences over time, learning which emails are most important to you and adjusting its filtering accordingly. You also have the option to set custom rules, granting you full control over how different types of emails are managed. The daily summaries group emails by type, making it easy to scan through and decide what requires your attention. Forage's TLDR feature captures the essence of each newsletter in a manner consistent with the original author's voice.

Email connected the world, but it lost its magic along the way. We believe it deserves better, and we're on a mission to bring email up to speed (literally) with modern messaging apps. Email should prioritize people, not advertising. Getting through your inbox shouldn't require busywork, and sending an email should be as fast as typing a text message. That's why we're building Shortwave: to recapture the magic of email with a beautifully designed product that works for everyone. Create channels to keep your team on-topic and make past conversations searchable. Instant delivery, typing indicators, and emoji reactions make conversations with other Shortwave users come to life. Use @-mentions to push notify the right people when you need them to join in. Shortwave connects to your existing Gmail account. Sign in today to get your inbox organized in minutes. You'll have the option to invite your teammates later.

Transform your inbox into a hub of efficiency. Streamline your communication to focus on what matters most. SkimAI is an AI assistant that transforms emails into actionable insights. It integrates seamlessly with Gmail and highlights unread emails, generates concise summaries of incoming messages, and drafts replies for your quick review and dispatch. Introducing intelligent email management. With AI-driven scheduling and custom workflows, SkimAI is more than a tool, it’s your productivity partner, evolving with your needs. Transform your emails into clear actionable insights. Embrace an inbox where efficiency thrives, decisions are swift, and clarity is paramount. Gain valuable time as communication is curated and prepared, even when you're away from your inbox.

Allyson - Your AI Executive Assistant. Allyson is a state-of-the-art AI executive assistant designed to automate and streamline routine business tasks, enhancing productivity and efficiency for professionals across various industries. Leveraging advanced AI and machine learning technologies, Allyson integrates seamlessly with your existing tools, providing comprehensive support for email management, calendar scheduling, and more. Key Features Email Management: Automate email responses, prioritize messages, and keep your inbox organized effortlessly. Calendar Scheduling: Manage your appointments, avoid scheduling conflicts, and streamline your daily schedule. Task Automation: Utilize Allyson’s AI capabilities to automate repetitive tasks, including web-based activities, allowing you to focus on more strategic work.

Aiva is an AI-powered email management tool designed to revolutionize your email workflow. It leverages powerful AI technology to transform your email management, allowing you to customize your email experience, effortlessly navigate your inbox, and let AI automation handle repetitive tasks. With Aiva's intelligent features, you gain control through inbox summaries, effective task management, and a seamless workflow. Aiva presents a summarized version of your inbox, highlighting the most important information, and allows you to customize the layout of your inbox to fit your workflow. It helps you stay on top of your to-do list by identifying tasks within your emails and organizing them in an easy-to-use task list. Aiva's AI algorithms automate repetitive tasks, freeing up your time for more important work, and its arrow-key navigation system enables seamless navigation through your inbox. Aiva is versatile and can be tailored to suit a variety of professions and tasks.

Extra Thursday is an AI-powered inbox assistant that connects to your Gmail and Google Calendar (via OAuth) to transform email management into a fast, context-aware, streamlined workflow. It treats your inbox like a database: it can scan thousands of emails in seconds, extract key insights or open loops, surface important threads, and highlight action items, so you don’t have to manually sort, search, or triage messages. Extra Thursday also drafts professional replies (from polite follow-ups to technical responses), auto-generates follow-up emails, and lets you review/edit before sending, dramatically reducing the time you spend writing and replying. With deep-context AI reading and understanding entire conversations, the platform helps manage email overload and makes your inbox actionable, rather than overwhelming. Privacy-wise, emails and calendar data are only fetched on demand per session; Extra Thursday does not store your full inbox or use your content to train its models.