
Why was this product recommended over others with better reviews? We try to find out.
As you probably know, Amazon has an algorithm that will provide product recommendations to you based on your shopping history and previous product ratings. What results is often variations of something you just bought (and thus no longer need), but from time to time, it also results in the discovery of new products you didn’t know you needed.
That’s what happened to our Japanese-language reporter Masanuki Sunakoma the other day (whose recent Amazon Japan purchase history includes things like a possibly cursed lucky cat statue and the cheapest clothing he could find). Amazon recommended a “portable shower” that sold for 7,800 yen (US$61), but only had a two-star rating. There must be better-reviewed portable showers out there, so why did Amazon recommend him this one?
Well, the item only had two reviews, so he could only assume it just hadn’t been tried and tested much. And the one written review simply said, “The pump wasn’t very good, so I opened the lid and used it.” Masanuki wasn’t exactly sure what that meant, but he thought maybe this product had promise regardless. In any case, there was nothing to do but buy it and try it out.
The item in question is called the “Portable Shower Solar Shower 20 L High Capacity Outdoor Shower Emergency Water Supply Bag with Upgraded Lifesaving Buoy Fit, Leak Prevention and TPU Water Resistance for Car Washing, Saltwater Bathing, Camping, Multiple Purposes, Disaster Preparedness, Portability“. It was a mouthful of a name that touted its many qualities and purposes. In this article, we’ll refer to it as the PSSS20LHCOSEWSBULBFLPTPUWRCWSBCMPDPP.
To Masanuki’s surprise, the product was neatly packaged and arrived in very good shape.
And when he opened it up…
He found that the PSSS20LHCOSEWSBULBFLPTPUWRCWSBCMPDPP actually looked pretty nice in spite of its two-star rating!
Despite the fact that it came from China, a Japanese user guide was included in the box. The Japanese was a little off, though, which made Masanuki worry he wasn’t going to be able to understand the instructions. However, it came with pretty clear pictures, so that gave him some hope.
The user guide called the PSSS20LHCOSEWSBULBFLPTPUWRCWSBCMPDPP a “comfortable and convenient rucksack”, and true to its name it comes with two removable straps to sling over your shoulder.
So after filling up the bag with water,
Masanuki took it out…
Into the yard…
Wearing it like a backpack! It actually looked pretty snazzy.
The shower is operated by a pump, so to use it you first have to attach the air pump hose…
And use your foot to pump air into the bag until it’s full to bursting.
Then all you have to do is attach the shower hose, and it’s ready to go.
Simply squeeze the lever…
And out comes the water!
It wasn’t too bad! Masanuki thought it was perfectly good for using as a shower while camping, but also as a shower in emergency situations. It fits 20 liters (5.3 gallons), which is equal to 20 kilograms (44 pounds), so even when full it’s not too heavy for older children to carry. It might even be good for gardening, though Masanuki noted that the water pressure wouldn’t really be strong enough for washing a car.
The bag also apparently warms up the water using solar power. Masanuki didn’t have much of a chance to test out that particular attribute, but as he wore it, he noticed that the bag itself got pretty hot. He would say that if you plan to heat up the water in the bag, it might be better to leave it hanging somewhere out in the sun instead of carrying it on your back. It has a nice handle for carrying that could double for such a purpose.
In browsing reviews of other similar products on Amazon, Masanuki found that the chief complaints about portable showers were leaking and low water pressure. His PSSS20LHCOSEWSBULBFLPTPUWRCWSBCMPDPP, however, had no problems with leaking. Plus, you can use it as a shower without the need for batteries, so Masanuki thought it should be rated higher than it is. Perhaps if it was a little cheaper, it would get higher ratings?
Masanuki rated it a four out of five and was grateful to Amazon for recommending it, because now that he has a portable shower and a portable bath, Masanuki is all set for camping this summer!
Images © SoraNews 24
● Want to hear about SoraNews24’s latest articles as soon as they’re published? Follow us on Facebook and Twitter!
[ Read in Japanese ]

















We bought a low-rated levitating speaker on Amazon that made us want to cry
Can the lowest-rated portable bathtub on Amazon Japan make our office a relaxing bathhouse?【Pics】
We try Amazon Japan’s lowest rated portable washing machine
Can Amazon Japan’s low-rated clothes drying bag save us in a pinch?
We get ready for camping season with Amazon Japan’s lowest-rated wooden mug
All Lotteria fast food restaurants in Japan to close by the end of March
Studio Ghibli releases new “komorebi” plush toys from Princess Mononoke and Spirited Away
We taste the Adult Cream Pie from McDonald’s Japan
These are Tokyo train lines people most want to live along【Survey】
Top 30 tourist sites in Japan: the most popular sightseeing spots for overseas visitors
Japan super budget dining – What’s the best way to spend 1,000 yen at McDonald’s?
Studio Ghibli releases new “komorebi” plush toys to brighten your days
We try an unusual buffet of dishes made from wild game at a roadside stop in Chiba
Rick and Morty star in epic Samurai & Shogun short for Adult Swim【Video】
Capsule hotel offers stays for $12 a night, extra perks make it one of the best deals in Tokyo
Japan releases first official sakura cherry blossom forecast for 2026
Starbucks Japan releases new drinkware and goods for Valentine’s Day
Visiting Japan’s Gyarados Pokémon park in the city with a special connection to Magikarp【Photos】
Majority of Japanese women in survey regret marrying their husband, but that’s only half the story
Massive manga collaboration bringing 100 years of Shueisha manga to Uniqlo T-shirts【Photos】
Japan’s kid-friendly ski program is now selling Pikachu snowboards for a limited time only
Totoro cream puffs and Catbus cookies are finally available in downtown Tokyo
Japanese vending machine serves up unique drinks at four Tokyo train stations
Tokyo pub explicitly soft-bans customers older than 39 from entering
10 times to avoid traveling in Japan in 2026
Starbucks Japan ready to get Year of the Horse started with adorable drinkware and plushies【Pics】
Starbucks Japan releases new Frappuccino and latte for Valentine’s Day
Our 52-year-old pole dancing reporter shares his tips for achieving your New Year’s exercise goal
Ramen restaurant’s English menu prices are nearly double its Japanese ones, denies discriminating
Japanese beef bowl chain Sukiya’s 2026 Smile Box lucky bag basically pays for itself
Lacquerware supplier to emperor of Japan and Pokémon team up for new tableware
Survey asks foreign tourists what bothered them in Japan, more than half gave same answer
Japan’s human washing machines will go on sale to general public, demos to be held in Tokyo
We deeply regret going into this tunnel on our walk in the mountains of Japan
Studio Ghibli releases Kodama forest spirits from Princess Mononoke to light up your home
Major Japanese hotel chain says reservations via overseas booking sites may not be valid
Put sesame oil in your coffee? Japanese maker says it’s the best way to start your day【Taste test】
No more using real katana for tourism activities, Japan’s National Police Agency says
Starbucks Japan reveals new sakura drinkware collection, inspired by evening cherry blossoms
Updated cherry blossom forecast shows extra-long sakura season for Japan this year
We try Amazon’s lowest rated posing mannequin, but it wasn’t the doll that was one star
We try Amazon Japan’s lowest-rated ab roller with elbow supports, reviewed as “The literal worst”
It’s a race against time with Amazon Japan’s lowest-rated hourglass
Trying out Amazon Japan’s lowest-rated fireworks with 60 consecutive shots
Testing Amazon Japan’s lowest-rated Screaming Pot【Video】
Low-Amazon-rated heater claims to melt car frost with energy blasts, does only half a thing right
Our one-star Halloween mask from Amazon has arrived! …in mid-November
Trying out Amazon Japan’s lowest rated magic wand
We brave the winter with the lowest-rated gloves from Amazon Japan
Amazon Japan’s lowest-rated beckoning cat good luck charm is full of lies, might be cursed【Pics】
A look inside Amazon Japan’s lowest-rated lucky bag
We buy the lowest-rated sexy pillow on Amazon Japan
Putting on a magic show with Amazon Japan’s lowest rated magic props
Trying to keep our cool with Amazon Japan’s lowest-rated fan and lucky amulet set
Let’s get into the holiday spirit with some low rated Christmas decorations from Amazon Japan
Leave a Reply