|This is the article on part one of the episode. For part two of the episode, head to Big Adventure! The Quest for the Fourth Hokage's Legacy Part 2.|
"Big Adventure! The Quest for the Fourth Hokage's Legacy Part 1" (大冒険! 四代目の遺産を探せ・前編, Daigōken! Yondaime no Isan wo Sagase Zenpen) is episode 170 of the Naruto: Shippūden anime.
Naruto attempts to master the Summoning Technique in order to use it during the final rounds of the Chūnin Exams, only to produce a tadpole with legs. As Naruto passes out from exhaustion, he manages to hear Jiraiya mutter how he had hoped Naruto would be able to use the Fourth Hokage's legacy to clear the final rounds.
After being discharged from the Konoha Hospital, Naruto and Chōji have lunch at Ramen Ichiraku, where Naruto leaves Chōji to pay the bill. He encounters Konohamaru, who shows Naruto his new Sexy Technique: Pole Dance and Nice Body. However, Naruto spots the Three Sand Siblings and apologises to Konohamaru for not having the time to spend with him, as he needs to find the Fourth's legacy in order to cinch the final rounds. After asking the Third Hokage about the Fourth's legacy and failing to get any answers from Anko, Guy tells him to go on a dangerous quest where he shall find the answer. Chōji, who had been spying on Naruto, informs Shikamaru and Ino where the Fourth's legacy is located, since they believe it would help Shikamaru win his match.
Sakura joins Naruto's quest as she secretly wishes to pass the Fourth's legacy to Sasuke to help him win. After Guy shows up pretending to be a sage (fooling no one but Naruto), Team 7 and Team 10 end up travelling together and, except for Shikamaru, find themselves stuck on a spider web. After Naruto uses his Naruto Uzumaki Combo to defeat the giant spider, which was nothing more than a summon, Shikamaru realises that it was an intentional trap and that there are more on their path. Careless, Naruto rushes ahead.
- A poster of Naruto Shippūden the Movie: The Lost Tower appears in this episode.
- There are plot holes in this episode:
- Konohamaru is shown wearing his helmet in this episode, although he had replaced it with goggles after meeting Naruto.
- Chōji is seen participating in the hunt for the Fourth Hokage's legacy, which takes place the day before the final rounds. However, at that time he was hospitalised due to indigestion, and was not discharged until right before Shikamaru's match. Additionally, Naruto, Shikamaru, Ino and Guy are involved in the quest as well, even though the day before the final rounds, Ino was at the hospital with Chōji while Shikamaru and Naruto encountered Gaara trying to kill Lee, who was saved by the arrival of Guy.