Nostalgic Children's Book Series - Open your book to see them again.

Children's books may contain simple words, but the stories inside are often more than sharp enough to entertain the readers. Hence why we believe some of you must have been addicted to certain books that your literature teachers instructed you to read back when you were children. In fact, those of you who are still in elementary and middle school in Japan have probably read some children's books for your "morning reading time", or "morning reading" (朝読) for short.

Now if we adults start reading some children's books, we might be surprised by how genuinely entertaining these books are. We might even come to look at the same book that we used to read as children from a deeper perspective, comprehend the undertones, and discover new findings.

This time, we are featuring some best-selling children's series that people from different generations have come to love. There are more than 1 million series out there, but which one did you like the most? Enjoy!

The main story was completed in 2004, but due to the fans' enthusiasm, the series was continued with the release of Zukkoke Chunen Sannin-gumi, which depicts the trio in their adulthood. The entire series ended with the publication of Zukkoke Jukunen Sannin-gumi. The entire series has published a total of 24 million copies.

The series has published 35 million copies in total and celebrated its 30th anniversary in 2017. The series ranks number 1 in the list of books that children pick during their morning reading time.

Students of Class 1-2 from a middle school in downtown Tokyo decided to have what they call "Our 7 Days War" during their summer holiday. The Bokura series depict the various incidents that these students face after the "war" began. The series has published a total of 15 million copies and the anime movie titled Bokura no Nanokakan Senso is scheduled to be released in 2019.

The series has published 3 million copies in total and has been adapted into manga. The anime movie adaptation premiered in September 2018.

Due to a trivial and yet bizarre reason, Chiyoko 'Choco' Kurotori finds herself becoming the apprentice of Gyubid, a black witch who came to earth from the realm of magic. This is a hilarious series about the two witches, Kurotori's quirky classmates, and magic spells.

The series is ongoing with the latest volume to be published sometime in January 2019. The series has also been adapted into anime and published 4 million copies in total.

The anime was aired on Fuji TV's Ponkikki Kids and adapted into a book series at the same time. The series has published 1.5 million copies in total and the second series, titled Gakko no Kowai Uwasa: Shin Hanako-san ga Kita!!, was published in 2006.

The series has published 1.5 million copies in total and has been adapted into manga.

The work is a smash hit in Japan and worldwide. It has also been adapted into both manga and anime and published more than 1 million copies in total.