[For Seniors] Popular Brain Training and Recreational Quizzes

Why is it that we don’t eat eel raw?

Eel has long been loved by the Japanese.

Dishes like unajū (eel over rice) and grilled kabayaki come to mind as delicious favorites.

However, you’ve probably never seen eel eaten raw.

Do you know why? It’s because eel blood is toxic, but the toxin is neutralized by heat.

As a guideline, heating at 60°C for 5 minutes makes it safe.

In recent years, processing techniques have advanced, making it easier to enjoy sashimi-style eel as well.

Take this opportunity to give it a try.

expand_lessRaise the rankingexpand_morelower

yamamoto

Report a problem

When you can’t stop coughing, drinking a syrup made by soaking a certain vegetable in honey can calm it. What is that vegetable?

The correct answer is “daikon radish.” A compound found in daikon called isothiocyanate has anti-inflammatory effects, and honey contains an enzyme called glucose oxidase.

This enzyme reacts with oxygen in the air to produce hydrogen peroxide.

Hydrogen peroxide, also known as “oxydol,” has disinfectant properties—the same “oxydol” used to disinfect wounds.

Based on this, “honey daikon” appears to help soothe coughs by disinfecting the throat and reducing inflammation.

The calves are also called the “second heart.” Using a part of the body, what is it called as the “second” what?

The calf, located on the back of the lower leg, has a nickname that uses the name of a body organ: “the second ___.” What is it? The hints are that it’s an internal organ and an indispensable organ not only for humans but also for animals.

The answer is the second “heart”! Blood tends to pool in the legs, but by actively moving the calves, blood circulates better and can be sent back to the heart more effectively.

That’s why they’re called the “second heart.”

expand_lessRaise the rankingexpand_morelower

SAKI

Report a problem

When is the expiration date for the ice cream?

Chilled and delicious ice cream.

Many of you probably eat it often.

Here’s a question: do you know when ice cream expires? If you’re near a freezer, try taking out some ice cream and checking.

There’s probably no expiration date shown.

That’s because, in fact, ice cream doesn’t have a best-before date.

So you can technically eat ice cream that’s several years old.

However, that doesn’t apply if it has warmed up at some point or been opened.

Therefore, it’s basically recommended to eat it while it’s still new.

expand_lessRaise the rankingexpand_morelower

yamamoto

Report a problem

There are three katakana characters hidden in the giraffe mark of Kirin Beer. What do the characters spell?

Kirin Beer, sold by the major beer manufacturer KIRIN.

On the cans and bottles of Kirin Beer, a mythical creature called a kirin is depicted.

So what are the three katakana characters hidden within the illustration of the kirin? When combined, these three characters form a word.

答えは――キリン！文字がとても小さく周りの線と馴染んでいるので一見わかりにくいですが、よく見ると「キリン」という語がはっきり見つかります。各文字は別々に配置されているので、ぜひ探してみてください！

expand_lessRaise the rankingexpand_morelower

SAKI

Report a problem