Winter Phone Care | Dealing With Cold and Battery Drain

In the cold outdoors or on snowy days, a phone battery may drain much faster than usual. As preparation before going out, small steps such as keeping it warm in an inner pocket or setting it up for use with gloves help. It also touches on condensation, static electricity from dry air, and points to watch when using the phone for long with chilled hands.

￥12,030

Phones for Seniors | Tips for Confident Daily Use

Many seniors hesitate to use a phone because they find it hard to operate and worry about scams. Knowing how to adjust text size, volume and brightness, and where to ask for help, makes everyday use easier. It also explains how to keep in touch with family who live far away and how to respond calmly to suspicious calls and messages.

￥12,030

The Habit of Looking Far | Avoiding Constant Near Focus

Using a phone continuously keeps your eyes focused up close for a long time and cuts down on chances to look into the distance. Looking far away every twenty minutes or gazing out a window, even at a sign a few meters away or a distant building, is enough to shift your focus. This book introduces timings for looking far that are easy to keep at work or home, plus light care around the eyes, in short time slots.

￥12,170

Pairing Exercise With Your Phone | Starting Home Workouts With Apps

Workout videos and apps are handy, but sometimes just watching them can feel like you have already exercised. Fix the time and place first and use the screen only as a model, and you can concentrate on the actual movements. It also explains the height and angle for placing the phone, how to pace yourself, and how to choose rest days.

￥12,170

Power Bank Safety | Choosing and Carrying Properly

Power banks are devices for which smoke and fire incidents triggered by impact, heat, or wear have been reported. When buying, choose a product marked as meeting safety standards, and it helps to know the signs of trouble such as swelling. This guide introduces how to read capacity and wattage, how to pack it in a bag, and rules for flights and disposal, including travel scenes.

￥12,310

Passcodes and Biometrics | Get Lock Basics Right

A phone with no lock, or one protected only by a simple number, may expose its contents if you drop it. Face and fingerprint unlocking is convenient, but knowing how it works and where its limits lie makes it safer to use. This guide shows what number patterns to avoid, how to build a longer passcode, and how to set the auto-lock time, following the real settings screens.

￥12,310

Children's Eyes and Smartphones | Family Rules for Healthy Use

Children often forget distance and time when absorbed and bring their faces close to the screen, often when adults fail to notice. Deciding where, when, and how close to use a phone together as a family, with parents following the same rules, creates rules that last. This book carefully collects age-based ideas and examples of encouraging phrases that do not involve scolding, along with how to run the family discussion.

￥12,310

Weekend Phone Breaks | How to Start a Digital Detox

Many people say they feel lighter after staying away from the screen for even a few hours on a weekend. You need not give it up for a whole day at first; starting small, such as only the morning, is the key to keeping at it. It also suggests ways to spend the time away and what to do when you cannot stop wondering about messages.

￥12,380

Shopping and Your Phone | Calming Impulse Buys and Your Budget

Online shopping and app ads can raise the urge to buy more than you need and loosen your hold on your wallet. Build in a pause, such as waiting overnight or leaving items in the cart for a few days, so you can cool down. It also covers dealing with the pull of points and alerts, and ways to make monthly spending visible.

￥12,450

Handling Notifications | Settings That Keep Your Mind Calm

Too many notifications break your focus again and again and add to your fatigue by the end of the day. Keep only the messages you really need and switch to checking the rest together at set times. It explains how to review each app and how to deal with the anxiety that can follow after cutting alerts.

￥12,520

Living Well With Your Eyes and Smartphone | Screen Fatigue Habit Book

Staring at a screen for a long time reduces how often you blink, tends to leave your eyes dry, and also tires the muscles that adjust focus. Simply adjusting brightness, text size, and viewing distance can change how tired your eyes feel, especially in a dark room at night. This book turns eye-friendly phone habits into small tips for situations such as commuting, working, and bedtime, arranged in the order that is easiest to try.

￥12,660

Caring for Your Thumbs | Hand Habits for Comfortable Phone Use

Long stretches of flick typing and scrolling can leave the base of your thumb feeling achy or a little hard to move. Ways to share the load, such as switching to two hands, using voice input, or resting an elbow on a table, are surprisingly easy. This book concretely introduces when to rest your hands and light stretches, matched to the flow of your day: morning, work hours, and after getting home.

￥12,730

Putting the Phone Down Before Bed | Bedtime Rules for Easier Mornings

Many people have lost track of time and found over an hour gone while watching videos or social media in bed. Small rules, such as charging away from the bed, using a separate clock as an alarm, and fixing your wake-up time, can change your bedtime habit. This book shows how to build bedtime rules you can keep, including common stumbling points and how to recover, with concrete steps and ways to tell your family.

￥12,800

Phone Use on the Commute | Easing Strain on a Moving Train

On trains your gaze moves with the sway, so your eyes and neck work harder than you might think and feel tired by the time you get off. Changing your grip when standing, sitting, or in a crowd, and steadying yourself with a strap or handrail, can reduce the strain noticeably. This book shows how to use a short commute well and simple ways to reset your body after you get off, including moments on station stairs and sidewalks.

￥12,870

Putting the Phone Down at Meals | Time to Savor Food

Looking at a screen while eating can leave little room to enjoy the flavor and aroma of the food, as often happens. This book shares ways to keep the phone off the table and tips for focusing on your meal. Aiming for a table where conversation grows, the book also covers ideas for when you eat alone.

￥13,080

Easing Phone Fatigue | Three-Minute Daily Body Release Collection

On long phone days, tiredness tends to build up in the neck, shoulders, hands, and eyes, and can last into the night. Adding just three minutes a day of small movements you can do while seated, and repeating them daily, makes it easier to feel loosened up. This book arranges simple movements you can do anywhere along a morning, noon, and night flow that fits within three minutes a day, in words that are clear even without illustrations.

￥13,080

Notification Settings | Protect Focus and Rest

Too many notifications interrupt your work again and again, and regaining focus takes longer than you might think. Sounds and screen light at night can also get in the way of falling asleep and cut into your rest time. This guide covers how to rank apps by priority, how to use focus and quiet modes, and the habit of checking notifications in batches.

￥13,360

Curbing Impulse Buys | Smart Habits for Phone Shopping

Because you can buy on a phone the moment the thought strikes, items that simply catch your eye can end up in your cart. This book offers calm ways to choose, such as waiting before buying and writing down why you want something. A question list you can check before buying calmly supports choices that fit your household budget.

￥13,360

Stay Safe by Updating | Keeping OS and Apps Current

Updates often include not only new features but also fixes for weaknesses that are already known. Staying on old versions leaves your phone an easier target for longer and raises the chance of unexpected harm. This guide explains, in manageable steps, automatic update settings, the free space and battery to check beforehand, and how to verify operation afterward.

￥13,780

Stop Phone Walking | Street Safety Habit Book

Using a phone while walking narrows your view sharply, so you notice people, bikes, and steps late. At station platforms, stairs, and crossings, a small lapse can lead to a collision or a fall that hurts you and others. This guide covers how to choose where to stop, how to let notifications wait, and how to check maps before you walk, using commute scenes.

￥13,780