Dragon Quest: The Adventure of Dai is one of the best-selling manga series of all time, with more than 50 million copies in circulation by 2022.

After the defeat of the Demon King Hadlar, all of the monsters were released from his evil will and peace reigned supreme around the world once again for ten years.

However, his training is interrupted by the return of Hadlar, who was resurrected by the Great Demon King Vearn and became the commander of his vast army.

To honor Avan's final request, Dai, Popp and Gome leave the island and begin their quest to defeat Hadlar and his master to bring peace back to the world.

During their travels, Dai's party gains three other members; the healer Maam, who later also becomes a martial artist, Hyunckel, one of Hadlar's former subordinates, and Leona herself.

Their enemies include Beast King Crocodine, an honourable but ruthless commander of Hadlar's army, the Mystic legion commander Zaboara and his son Zamza, a magical elemental of ice and fire known as Flazzard, the illusive Mystvearn, who himself is a greater servant of Vearn and is Hyunkel's teacher of black magic, Killvearn, a jester who is Vearn's personal assassin, and Baran, a legendary warrior and Dai's father who sided with Vearn after the death of his wife and the disappearance of his son.

[4][5][6] Dragon Quest: The Adventure of Dai was serialized for seven years in Weekly Shōnen Jump from October 23, 1989, to December 9, 1996.

[11][12] A 25-volume edition that includes the color pages from its original magazine run and newly drawn covers by Inada was published between October 2, 2020, and July 2, 2021.

[16] A prequel manga series, titled Dai no Daibōken: Yuusha Avan to Gokuen no Maou, illustrated by Yūsaku Shibata, with Sanjo credited for original work, began serializing in Shueisha's V Jump on September 19, 2020.

The set contained all 46 episodes, and the three Toei Anime Fair short theatrical movies (including the first film never before released on home video), which have been scanned from their original 35 mm negatives with high resolution and recorded as high-quality full HD remastered images.

[24][25] Three short theatrical movies were produced based on the first TV series, all of which premiered at the Toei Anime Fair film festival.

[34][35][36] Toei simulcasts the series with English subtitles in North America, New Zealand, Africa, and Europe via Crunchyroll, as well as Hulu in the United States.

[42] Dragon Quest: The Adventure of Dai – A Hero's Bonds, a smartphone RPG for iOS/Android, was released worldwide on September 28, 2021,[43] and was closed on April 26, 2023.

[46] Dragon Quest: The Adventure of Dai is one of Weekly Shōnen Jump's best-selling manga series of all time,[47] with over 50 million copies in circulation by 2022.