I was confused about choosing an oral irrigator or jet washer, so I actually tested and compared the top 21 best-selling products. I evaluated water pressure strength, ease of use, and maintenance, and I found that there are quite a few differences between products.

First place is Panasonic's ドルツ. It has a high water pressure of 42.80 kPa, which almost removes plaque between teeth. It offers 10 levels of water pressure adjustment, making it easy to use even for people with sensitive gums. The tank capacity is also large at 600 mL, which reduces the frequency of refilling. I think it's the top recommended ジェットフロス.

Second place is YA-MAN's ジェットフロス EX. It has a fairly strong water pressure of 45.80 kPa. Being cordless and portable is very convenient. However, the tank capacity is only 220 mL, so it might not be suitable for those who want longer care sessions. It offers 6 levels of adjustment and a BOOST mode for good customization.

Third place is HandyBio's tankless type. It has a high water pressure of 49.15 kPa and is easy to prepare. But since it doesn't have adjustable water pressure, it might be tough for people who need a different strength. Its compact size makes it great for travel.

If you're budget-conscious, SILVLF and CLEARLABO also offer high water pressure over 50 kPa, which isn't bad. However, I think products with finer adjustment options tend to last longer. The best ジェットフロス depends on your gum sensitivity and budget, so choose based on those factors.