スマホ・アプリCan't do anything because your smartphone is full? 7 ways to free up space on your iPhone/Android right awayAre you having trouble with the “Storage is full” notification on your smartphone? From organizing photos, apps, and cache to using the cloud and using SD cards, we will explain 7 ways to increase free space on both iPhone and Android, in order of effectiveness.2026.02.24佐藤 理香
お金・届出Can't log in with Rakuten Securities passkey? 5 causes of authentication errors and solutions you can try now [2026 edition]We explain 5 reasons why you cannot log in with Rakuten Securities passkey authentication (app not updated, not in recommended environment, VPN, 1 account 1 passkey restriction, device settings) and solutions you can try right away. We also introduce how to pause using automatic voice dialing and how to delete the passkey.2026.02.24山田 結衣
暮らし・家事What is the difference between genuine laundry tank cleaners and commercial products? Thorough comparison of ingredients, effects, and costs [2026 edition]Manufacturer's genuine washing tank cleaner and commercially available products have completely different ingredients and cleaning methods. We will clearly explain the difference between chlorine-based and oxygen-based products, model numbers and price comparisons of genuine products from each manufacturer, and recommended usage.2026.02.24鈴木 遥
AI・チャットボットGemini's thought process revealed? Causes of Chain-of-Thought leaks and 5 measures to protect your dataIn February 2026, there have been a number of reports of Gemini's Chain-of-Thought being displayed unintentionally. We will provide easy-to-understand explanations of examples and causes of thought process omissions, and five measures to protect your data.2026.02.24高橋 湊
お金・届出Can't charge to PayPay? Easy-to-understand explanation of 7 causes and how to deal with each method [2026 edition]An easy-to-understand explanation of the causes and solutions for when you can't charge to PayPay by charging method. Includes 7 causes and quickest checklist, including incomplete identity verification, exceeding limit, and bank account registration error.2026.02.24山田 結衣
AI・チャットボットCan't use Gemini's thinking mode? Restrictions on the number of times, reasons why it is not displayed, and tips to use it even in the free version [2026 version]Explains 5 reasons why Gemini's thinking mode (Thinking) cannot be selected or displayed and how to deal with it. From the structure of the free version's usage limit (3 to 5 times a day) to the usage techniques that produce results even with a small number of usages.2026.02.23高橋 湊
お金・届出Can't connect credit card to accounting software? Causes and remedies for Yayoi, freee, and money forward [Final tax return 2026]Easy-to-understand explanation of 5 reasons why credit cards cannot be linked to accounting software (Yayoi, Freee, Money Forward) and solutions for each software. We will also introduce the procedure for manually importing CSV when automatic linkage does not work.2026.02.23山田 結衣
スマホ・アプリHow to listen to radio on an old smartphone that cannot install radiko | 5 alternative apps and tricks [2026 edition]Explains how to listen to the radio on an old smartphone where radiko cannot be installed. We will introduce how to check the recommended OS requirements, 5 alternative apps such as RAJIRU★RAJIRU and WIZ RADIO, and tricks to listen to music in your browser.2026.02.23佐藤 理香
パソコン・ソフトHow to revive an old PC that cannot be upgraded to Windows 11 with Ubuntu | Complete guide for beginnersWhat to do with an old PC that can't be upgraded to Windows 11 after Windows 10 support ends? We will explain step by step for beginners how to install and continue using the free OS "Ubuntu" safely.2026.02.23中村 健太
スマホ・アプリDoes the app say "not supported" on your old smartphone? How to identify the cause and 5 remedies [Android]4 reasons why you can't install apps because Google Play says "Your device is not compatible with this version" and 5 solutions. Solve the problem of not being able to use LINE or radiko on a used or old Android smartphone.2026.02.23佐藤 理香
AI・チャットボットClaude Code not working the way you want? 5 common addictive patterns and how to give good instructionsAre you stuck with Claude Code and thinking, "It's working, but the result isn't what I was looking for?" We will explain the five pitfalls that beginners tend to make and how to give instructions to get the desired results, along with pricing and function information as of February 2026.2026.02.23高橋 湊
スマホ・アプリCan't use Suma Ticket/Electronic Ticket due to smartphone malfunction? Reissue procedure by platform and 3 preparations to make in advanceWe explain what to do when you can't display your electronic ticket (Smartphone, Law Ticket, TicketPla) due to a smartphone malfunction or model change, for each platform. We will also introduce you to identity verification on the day of admission and 3 things you should do in advance.2026.02.23佐藤 理香
