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Gemini's New Feature Now Available in Japan | The Full Picture of a Personal AI That Reads Your Emails and Photos
機械翻訳 / Machine-translated
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AI Friends
2026年4月26日・22分で読める
機械翻訳 / Machine-translated
@aifriends
AI Friends（https://aifriends.jp）のクロスポスト公式アカウント。AIツールの紹介・使い方・できることを、中学生でもわかるやさしい日本語で届けます。
"What makes Gemini any different from ChatGPT?" — If you've ever wondered that, here's some news you'll want to pay attention to right now.
On April 14, 2026, Google launched a feature called "Personal Intelligence" for its AI assistant Gemini in Japan. It reads your Gmail, photos, and YouTube history to deliver answers optimized just for you — like a longtime personal secretary who knows you inside and out.
In this article, we'll thoroughly explain what it can do, how to set it up, and whether your privacy is safe — in plain language anyone can understand.
In a nutshell, Personal Intelligence is a feature that "reads all of your Google data and crafts answers tailored specifically to you."
The old Gemini gave "the same answer to everyone."
But with Personal Intelligence turned on, it reads your Gmail, Google Photos, YouTube watch history, and Google Search history to generate responses optimized just for you.
Think of it this way: regular Gemini is like "a well-stocked library."
Gemini with Personal Intelligence is like "a brilliant personal secretary who knows everything about you."
A library lends the same books to everyone, but a secretary says, "You were reading that kind of book last year — how about this one next?" and makes personalized suggestions.
Here's a timeline of how this feature spread around the world:
Paid plan subscribers (Google AI Plus, Pro, and Ultra) can use it now, and Google has announced it will roll out to free users within a few weeks.
Say you're looking for pants to go with a jacket you bought last year.
Ask Gemini, "Suggest some pants to go with the jacket I bought last year," and it will automatically read your Amazon or Rakuten order confirmation emails in Gmail, identify the brand and color of the jacket you purchased, and suggest the perfect outfit to match.
It's like having a fashion-savvy friend who says, "Oh right, you bought that jacket last year," and still remembers.
Ask it to "Collect all my cherry blossom photos from last year" or "When did we go on that family trip?" and Gemini will search your Google Photos and compile the results.
No more scrolling through thousands of photos yourself — it's especially helpful for anyone who feels overwhelmed by an unmanageable photo library.
In an official demo highlighted by Google, asking "Find winter tires that fit my car" prompts it to locate a photo of your car in Photos, identify the make and model, and suggest products that match your tire size.
Ask "What should I learn next based on the Python videos I've been watching lately?" and it will review your YouTube watch history, gauge your progress, and suggest the next recommended videos or topics to study. You save the effort of building playlists yourself, and it's easier to stay motivated.
Ask "Which emails from last week haven't I replied to?" or "What was the most recent email from so-and-so about?" and the AI will search Gmail in real time and return a summary.
For anyone who struggles to manage email, this is nothing short of a lifesaver.
Even if hundreds of messages are piling up in your inbox, just say "Pick out the important ones" and they'll be sorted for you.
Ask "What kind of budget should I set for next month's trip?" and it will calculate your average travel spending by reading past hotel and flight booking confirmation emails in Gmail. An era is beginning where "the kind of household budgeting you used to enter manually into Excel can be automated just by connecting Gmail."
Setup is simple and works on web, Android, and iOS.
Everything is off by default.
You can configure it precisely — "connect only Gmail" or "don't connect Photos."
Note: To connect Google Photos, you'll need to enable the "Face Groups" setting in advance and register your own face.
Privacy concerns are completely understandable. Google has officially clarified the following:
Some people may feel like "Google is seeing everything."
But in reality, Google already has your emails and search history.
The difference this time is that "the AI is actively reading and interpreting them."
If you're concerned, you can limit the connected apps to the bare minimum (just YouTube, for example) or simply leave everything turned off.
There are voices online saying "Personal Intelligence isn't for me."
The main reasons are three: ① concerns about data concentration at Google, ② psychological resistance to having emails and photos read, and ③ a segment of people who simply don't feel they need the feature.
Because it's entirely opt-in, your data won't be read if you don't use it.
Choose what works for your lifestyle.
Let's answer the question: "How is this different from ChatGPT's Memory?"
ChatGPT's Memory is a feature that "remembers what you tell it."
Tell it "I'm a cat lover," and it will factor that into future responses.
Gemini's Personal Intelligence, on the other hand, "reads the Google data you already have — emails, photos, history — in real time."
It can understand context from your past behavior without you having to tell it anything.
This is a significant distinction — the scope and depth are fundamentally different.
Copilot integrates deeply with Outlook and OneDrive, making it a powerful option for Microsoft 365 users.
Gemini, meanwhile, connects with Gmail and Google Photos, making it the best fit for people who use Google services heavily.
Which one is right for you depends on "which ecosystem you live in."
To put it simply: "Google users → Gemini, Microsoft users → Copilot, people who don't want to be locked into any ecosystem → ChatGPT."
Android's market share in Japan is high, and Gmail and Google Photos are already woven into most people's daily lives. As Personal Intelligence spreads, various groups are likely to feel its effects.
Mr. A (42), who runs a general goods store in Taitō, Tokyo, handles over 100 emails every day.
"It was a hassle searching by subject line for each business contact, and I'd sometimes miss important emails," he says.
With Personal Intelligence, he can simply ask in natural language: "What's the latest quote from [Company X]?"
The burden of managing email looks set to drop significantly.
High school senior Ms. B is studying English on her own.
"I never know which YouTube videos to watch," she says — so Gemini draws on her watch history and suggests, "This video from this channel would be a great match for you next."
An era is beginning where AI becomes a learning coach for students in rural areas who can't attend a prep school.
While the benefits are real, the concern that data concentration at Google will deepen further can't be ignored.
When Gmail, photos, video, search, and AI are all consolidated under Google, risks grow — "What if Google shuts down a service?" or "What if a policy change alters how our data is used?"
It's important to understand the balance between convenience and risk before diving in.
A. As of now (April 2026), it's available first to paid plan subscribers (Google AI Plus, Pro, and Ultra).
Google has announced it will "roll out to free users within a few weeks."
Free plan users should be able to access it before long if they wait a little while.
A. No, it will not. Google explicitly states in its official Help documentation that "data accessed through Personal Intelligence is not used to train the model."
A. Gemini can only access them if you have the connection turned on.
Which photos were referenced will be displayed on screen.
If you're concerned, you can turn off just the Google Photos connection.
A. It works on web, Android, and iOS. Download the Gemini app from the App Store, log in with your Google account, and you're ready to go.
A. ChatGPT's Memory "remembers what you tell it," whereas Gemini's Personal Intelligence "reads the Google data you already have in real time." The fundamental difference is that it can understand context from your past behavior without you having to tell it anything.
A. Once you disconnect, Gemini can no longer access that app's data. The disconnection takes effect immediately and can be done at any time from the settings screen.
Google already holds an enormous amount of our daily-life data — search, email, maps, video.
Personal Intelligence is the feature that opened the door, for the first time, to having "AI read across all of it."
The smart approach is to stay aware of the trade-off between convenience and privacy, and incorporate it at your own pace.
If you're already using the Google ecosystem, we recommend starting with something small — "just YouTube" or "just Gmail" — and seeing how it feels.
This article is a cross-post from AI Friends.
