[For Adults] Fun Activities and Hobby Ideas for Rainy Days
You made plans to hang out with a friend, checked the weather forecast for the day, and saw rain…
You might have found your way here because you’re wondering, “Uh, what should we do then?”
In this article, we’ll introduce activities and hobbies you can enjoy at home on a rainy day.
Although the earlier example was “hanging out with a friend,” these ideas are also perfect for spending time solo.
And because the theme is “for adults,” some of them require fairly serious preparation.
But… that’s exactly why these ideas are so rewarding and satisfying!
- [For Adults] Fun Things to Do on a Rainy Day
- [Simple Games] Recommended Indoor Recreational Activities for Adults
- A collection of simple indoor recreational games
- [For Adults] Fun recreational games. Perfect for short breaks too!
- A simple and fun co-op game that enhances teamwork
- Team-based recreational activities for adults that are fun even with large groups
- Recommended ways to kill time that you can do alone at home
- [For Kids] Fun Indoor Game Ideas for After-School Day Services
- [Part 2] Recommended Indoor Activities and Recreation Games for December
- Fun for kids and adults alike! A collection of DIY beanbag (otedama) ideas
- [For Men] A Collection of Hobby Ideas You Can Get Absorbed in on Your Own
- Games you can play with just conversation. Classic and popular activities you can enjoy without any props!
- [For Adults] Make the Most of Your Free Time! Ideas to Kill Time
[For Adults] Fun Activities and Hobby Ideas for Rainy Days (1–10)
Cardboard crafts for adults

How about some authentic “adult cardboard crafts” you can enjoy indoors? Even if DIY with wood feels intimidating, you can easily give it a try using cardboard, a material close at hand.
In this video, we introduce three amazing items made from cardboard! Believe it or not, you can make a drink station and a vending machine out of cardboard.
The drink station actually dispenses juice and coffee, and the vending machine will vend a drink when you insert money! You’ll also learn how the mechanisms work, so it’s educational too.
Outfit showdown

How about a “styling showdown” as a game that can liven up a rainy day indoors? You can bring your own clothes, or set a budget—like within 5,000 yen per person—buy outfits, and get ready that way.
It might also be fun to have a friend model while you dress them in the outfit you picked and let other friends be the judges.
Your fashion sense will be put to the test, so it’s sure to be thrilling and exciting, with a game-like feel that will definitely deepen your friendships! If you suddenly find yourself with free time and don’t know what to do, give this a try.
three-dimensional paper cutting

Let me introduce a “3D paper cutting” project that’s perfect for passing time on a rainy day.
It’s especially recommended for people who enjoy detailed handiwork or are good with their hands.
Prepare a precision craft knife, a cutting mat, and a thin paper called TANT paper.
Cutting out fine patterns requires patience and concentration, so it’s also ideal if you want to immerse yourself in something and relieve stress.
To add a three-dimensional effect, we use pearl-sized beads.
Once you’ve created the rounded shapes, glue the paper layers together.
It’s a project that gives a great sense of accomplishment, so it’s also great as a hobby!
[For Adults] Rainy-Day Activities and Hobby Ideas (11–20)
Aquarium

An aquarium is something you can enjoy indoors that also brings a sense of calm, isn’t it? I think many people want to try keeping living creatures in a tank.
Even beginners can easily get started with a small aquarium, making it a perfect hobby for busy adults! In this video, we clearly explain the equipment and supplies, aquascaping layouts with aquatic plants, how to make a yeast-based CO2 system, and more—so please use it as a reference.
Let’s relieve daily stress with your very own personal aquarium!
Aromatherapy

You might be thinking, “What is aromatherapy, anyway?” if you’re interested in starting but aren’t quite sure what it is.
How about trying aromatherapy as a rainy-day pastime or a new hobby? Aromatherapy isn’t just about relaxing with pleasant scents—it’s actually a health practice that uses fragrance.
Aromas are derived from plants, and plants are believed to help balance the mind and body and enhance the body’s innate self-healing ability.
If you want to study more seriously, you might consider taking an aromatherapy certification exam!
Illustration Showdown

If you can’t go out on the day because it’s raining even though you had plans with friends, why not liven things up with an “illustration showdown”? You could each draw your favorite anime character and compete on how well they turn out! Like in this video, if everyone draws the same character at once, each friend’s unique style will come through and make it really fun.
I think everyone has tried copying a character at least once, and it’s enjoyable regardless of age, so if you find yourselves with some free time, definitely give it a try.
Carving

Some of you may want to try fruit carving—a beautiful, art-like craft—at least once.
It’s also great as a hobby you can enjoy at home, perfect for passing the time on a rainy day.
By using larger fruits like watermelon, you can create striking decorative cuts even with designs that aren’t overly intricate.
The video carefully explains how to make rose and heart designs, so feel free to use it as a reference.
The gradient between the green rind and the red flesh of the watermelon creates a beautifully finished look!


