![[For Sports Day and Halloween] Handmade Ninja Costume and Item Ideas](https://media.ragnet.co.jp/img/1200__png__https://www.studiorag.com/files/2025/05/d5bc37c0ae46388d7a2557fffa2bfd2a.webp)
A classic cosplay staple since long ago: the ninja.
Not just for kids—plenty of adults would love to try being a ninja and play ninja games too! Even if you don’t visit a ninja theme park, how about enjoying handmade costumes and the items ninjas carry? In this article, we’ll share ideas for easy ninja cosplay you can enjoy with everyday materials, plus DIY ninja accessories.
Perfect for children’s Halloween costumes, pretend play, or even sports day outfits.
Have fun with colorful ninja costumes and realistic-looking accessories!
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Costume ideas (1–10)
Because ninja outfits are for “shinobi,” we tend to picture them as all black in dramas and anime.
But if you’re making one as a fun costume, why not use your favorite colors and make it colorful? Especially if a child will be wearing it, you’ll want to finish it in cute styles with their favorite colors and patterns! Use the ideas introduced here as inspiration and let your imagination grow for the look you want to create!
Ninja hood with a furoshiki
Let’s have fun making a ninja hood using a furoshiki cloth! It’s easy to try, so it’s great for sports day or Halloween costumes.
It’s also a fun idea for playing ninja with your kids or friends.
First, prepare a large furoshiki, wrap it so it covers the face, and tie it at the back of the head.
Next, roll up the part covering the face and bring it to the back of the head.
To finish, overlap the left and right ends of the cloth and secure them near the chin with an elastic band—that’s it! If a child is wearing it, be sure to secure it near the chin so it doesn’t hurt their neck or make it hard to breathe.
Ninja-style outfit made with a T-shirt
Here’s a budget-friendly idea for when you’re thinking about a ninja costume for a sports day or Halloween but don’t want to spend much.
Use a black T-shirt: wrap it around your head, leaving just the eye area open, and tie it to create an easy ninja look! If you wear a black long-sleeve shirt and black pants to go all-black, you’ll be surprised how real it looks.
You can also add contrast by making ninja accessories like shuriken and kunai colorful.
It’s a great idea for ninja pretend play, too—give it a try!
A matching top-and-bottom outfit made from garbage bags
This is an easy ninja costume made with everyday materials—a trash bag.
Size the trash bag to your child’s body, then just cut openings for the neck and sleeves to complete the top! You can decorate it with origami shuriken like appliqués, or draw your favorite patterns with a pen.
For the bottoms, cut the hem and the crotch area, then join the crotch seam with double-sided tape or similar to finish.
Adjust the waist by gathering it with elastic or threading an elastic cord.
It’s perfect for kindergarten or nursery school sports day outfits and Halloween events, so give it a try!
Made with colored plastic bags
Ninjas are traditional Japanese characters that are also popular overseas.
Let’s make costumes that match unique songs and dances! Place the prepared colored plastic bag with the bottom side facing up, and tape on the collar piece.
Next, use scissors to cut openings for the head and sleeves as well as shape the collar, and you’re done.
By adjusting the bag’s size and color, you can enjoy a variety of arrangements.
You might also create matching accessories like a hood for the head or shuriken.
These costumes suit a wide range of events, from sports day songs and dances to various other activities.
Witch’s cloak
Have you ever wanted to become a witch? If so, try making a witch’s cloak.
What you’ll need are a large colored trash bag, glitter tape, double-sided tape, and so on.
Layer the colored trash bags and cut the hem into a jagged shape to give it a witch-like look.
Thread elastic through the inside and fasten it with double-sided tape to complete the skirt.
Make the top out of a trash bag as well.
Once the main pieces are done, add decorations with glitter tape.
If you also make a magic wand to carry with it, the witchy vibe will be even stronger.
Made with 100-yen store materials
Don’t underestimate 100-yen shops—they’re packed with DIY supplies! How about making a ninja costume using affordable items from the 100-yen store? You can combine fabric scraps and embellish with cords, ribbons, or sequins.
If making the ninja robe is tricky, you can still get into the ninja spirit with just accessories like a hood, headband, sash, or sword.
Since everything’s only 100 yen, it won’t sting if you make mistakes, so why not explore different materials and give it a try?
Ninja costume made of satin fabric
With its smooth, glossy finish, satin fabric is perfect for standout costumes! Make a ninja outfit with satin and really shine at sports festivals or for Halloween.
Lightweight satin is also easy to work with—that’s a plus! It’s great for machine sewing and also recommended for hand sewing.
You can create a full set—kimono top and bottom, hood, and sash—or just make accessories like the hood, hand decorations, or sash to get that ninja vibe.
With a range of colors like red, blue, and yellow, it’s fun to make them in different color variations, too!
costume with a name
How about livening up sports day or Halloween with a personalized ninja costume? If you put your child’s name on the hood or on the chest of the kimono, it won’t just stand out—it’ll also make it easier to find your child! The costume can be handmade or store-bought.
Even adding a name appliqué or embroidery to a ready-made outfit instantly gives it originality.
If you’re not confident in sewing, please use this as a reference.
Choosing your child’s favorite color will delight them and make lasting memories.
Made with colorful fabric
Since ninja are originally stealthy, flashy outfits are technically a no-no—but making one from colorful fabric could be fun! Instead of a solid color, you could go for checks or polka dots to create a pop-style ninja look.
If you’re thinking about a ninja costume for a sports day or Halloween but haven’t come up with a good idea yet, definitely use this as inspiration! Craft stores carry all kinds of colorful fabrics, so it could be fun to pick a pattern together with your child.
How about enjoying your event to the fullest with a colorful outfit that turns the traditional ninja concept on its head?
Ninja headscarf made from newspaper
If you’re thinking about a ninja costume, how about a ninja hood made from newspaper? You fold it out of newspaper, and the steps are so simple that even kids can make it.
The best part is, you can adjust the size while folding, so you can create a hood that fits your head perfectly.
It’s a great idea when you want to go with handmade costumes for events like school plays or presentations.
You can even use origami to add a shuriken pattern—it’s easy to customize, which is a nice bonus!
Ninja Items and Accessories (11–20)
To fully become a ninja, you’ll want to make not only the costume but also the small accessories ninjas carry.
From the well-known shuriken to weapons that make you think, “They use this too?”, we’ll show you how to craft essential ninja items.
With these accessories, you’ll look cooler and more authentically ninja.
And above all, they’ll get you even more into the ninja spirit!