Volume 16 is titled "Inherited Will".
Cover and Volume Illustration
The cover has a light yellow background. The title in is in dark teal spectrum gradient while the author's name is printed in pink.
The cover features Monkey D. Luffy and Tony Tony Chopper happily sitting in the foreground, with Dr. Hiriluk behind them standing up and holding a flag with his Jolly Roger in it. There are also Sakura petals floating around in the background.
The spine features Hiriluk and Chopper.
- 0137. Avalanche (雪崩 Nadare?): Sanji sacrifices himself to save Luffy and Nami from the avalanche and ends up unconscious.
- 0138. The Summit (頂上 Chōjō?): Luffy is attacked by Wapol and his men, but is saved by some lapahns. After a hard trek, he eventually gets Nami and Sanji all the way to the summit.
- 0139. Introducing Tony Tony Chopper (トニートニー･チョッパー登場 Tonī Tonī Choppā Tōjō?): Nami regains consciousness after being treated by Doctor Kureha, and meets the doctor as well as her assistant, a talking reindeer named Tony Tony Chopper.
- 0140. The Castle of Snow (雪の住む城 Yuki no Sumu Shiro?): As Luffy and Sanji try to eat Chopper, Kureha tells Nami about the reindeer's past.
- 0141. Quack Doctor (ヤブ医者 Yabu Isha?): Wapol comes to Drum Castle to retake it, but Kureha and Chopper defend it in honor of their deceased friend Hiriluk.
- 0142. Skull and Sakura (ドクロと桜 Dokuro to Sakura?): It is shown how Chopper came to know Hiriluk.
- 0143. Clumsy (不器用 Bukiyō?): After learning that Hiriluk had little time left to live, Chopper went searching for a cure.
- 0144. Snowy Tale (雪物語 Yuki Monogatari?): Hiriluk consumed the mushroom Chopper found for him and went off to treat the sick doctors, but Chopper then learned from Kureha that the mushroom was poisonous.
- 0145. Inherited Will (受け継がれる意志 Uketsugareru Ishi?): Hiriluk was trapped by Wapol's forces, but committed suicide. Chopper then joined Kureha to learn how to become a doctor.
- Oda reveals his habit of naming female characters after birds.
- More on Negikuma Maria from Drum Island is revealed.
- A reader asks about Luffy, Zoro and Sanji's parents, but Oda avoids answering.
- Vivi's and Chopper's birthdays are revealed.
- More on the Super Spot-Billed Duck (Karoo's species) is revealed.
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