science

Truck-kun

Truck-kun is a science topic covered in the lgStudy science library. This page brings together a partial reference excerpt, illustrations, worked examples, real-world applications and a short study plan, so you can understand Truck-kun rather than just read about it. In short: Truck-kun is an Internet meme that refers to a common trope used in the isekai genre of anime, manga, and light novels, in which characters are transported to other worlds. Typically, the protagonists of the isekai anime or manga are sent to these worlds via various methods, including reincarnation after death, and many isekai works have featured characters being transported upon being hit and killed by a truck.

Key takeaways

Truck-kun belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Truck-kun to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Truck-kun from memory before moving on to harder problems.

Reference excerpt

Truck-kun is an Internet meme that refers to a common trope used in the isekai genre of anime, manga, and light novels, in which characters are transported to other worlds. Typically, the protagonists of the isekai anime or manga are sent to these worlds via various methods, including reincarnation after death, and many isekai works have featured characters being transported upon being hit and killed by a truck. After several isekai works featured this as a means to kill their characters, a meme claiming the existence of a character named "Truck-kun" spread. It is purported that Truck-kun's role is to kill people in their original world and subsequently send them to a new one.

Origins of the meme Early examples of discussion of the trope include a Reddit thread entitled "Trucks in Manga – RE: Marina" by user poloport from April 14, 2015. In the post, a page from the manga RE: Marina shows the central character Rinosuke being hit by a truck. The character is not killed, but the incident brings the main characters in the story together. This post resulted in further posts in which people pointed out examples of trucks running into the protagonists of manga, with isekai manga featuring heavily. In 2017, an anime fan compiled a list of causes of death among isekai protagonists, which was updated in 2018. Deaths caused by "Traffic accident by truck" came third in the study with 37 cases, with general traffic accidents coming second with 38 cases, and unknown causes first with 102 cases.

Later developments Critics have since recorded the appearance of "Truck-kun" in multiple series. These include Didn't I Say to Make My Abilities Average in the Next Life?!, Mushoku Tensei, The Eminence in Shadow, Zombie Land Saga, and Wise Man's Grandchild. There are also alternative versions and parodies of the plot device, such as in KonoSuba, where lead character Kazuma Satou dies from shock after rescuing someone from being run over by what he thinks is a truck, but is later discovered to be a slow-moving tractor that posed no danger to the person he was attempting to save. The series most directly referencing the idea is Isekai Transporter, a manga essentially starring Truck-kun.

Response to the meme Since the creation of the meme, people have retrospectively examined earlier series to see other uses of motor accidents in anime and manga. Examples include Osamu Tezuka's sci-fi manga Astro Boy, in which Tobio Tenma is killed in a car accident at the beginning of the story, resulting in his father creating the robot Astro Boy in his image; as well as the anime series Magical Princess Minky Momo, in which Momo loses her powers and is killed by a truck late in the series before being reincarnated as a baby. Another prominent precursor to this phenomenon that long predates the "isekai boom" in anime is the 1984 fantasy mecha series Aura Battler Dunbine, created by Yoshiyuki Tomino, in which the protagonist is killed in a vehicular altercation while confronting an adversary and transported to another world.

See also Life on Mars, a TV series in which the protagonist is sent from 2006 to 1973 after being hit by a car Truck-kun is Supporting Me from Another World?!, a video game which uses the trope as part of its core premise

Notes

References

External links Media related to Truck-kun at Wikimedia Commons

Illustrations

Worked examples

Example 1 — a first encounter with Truck-kun

Start with the simplest possible case. Write down what Truck-kun claims or describes in one sentence, then invent the smallest concrete situation in which that sentence is true. In science, the smallest case is usually a single object, a single equation or a single measurement. Check that every symbol or term in your sentence has a meaning in that case.

Example 2 — changing one variable

Take the situation from Example 1 and change exactly one quantity: double it, halve it, or set it to zero. Predict what should happen to Truck-kun before you calculate. Comparing your prediction with the result is the fastest way to find out whether you understand the idea or only the words.

Example 3 — an exam-style question

Typical questions about Truck-kun ask you to (a) state it precisely, (b) apply it to given data, and (c) explain a limitation. Practise writing all three answers in under five minutes; the third part is what separates a full-mark answer from an average one.

Applications of Truck-kun

In research: Truck-kun appears in science research whenever the underlying quantities have to be modelled precisely. Papers usually cite it as a starting assumption and then explore where it breaks down.
In technology and industry: Engineering practice reuses Truck-kun in design rules, simulations and safety margins. Knowing the idea lets you read a specification sheet and understand why the numbers look the way they do.
In the classroom: Truck-kun is common in secondary-school and first-year university syllabi. It links to neighbouring topics Anime and manga terminology, Fiction about reincarnation, Fictional serial killers, so understanding it makes those chapters shorter.
In everyday life: Look for Truck-kun outside the textbook — in sport, cooking, traffic, electronics or the sky above you. An example you found yourself is remembered far longer than one you were given.

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How to study Truck-kun in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Truck-kun means in your own words.
Compare your version with the excerpt and mark what you missed.
Work through the three examples above with pen and paper.
Explain Truck-kun out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Truck-kun in simple terms?

Why does Truck-kun matter?

Because it connects several science ideas at once: it gives you a definition you can apply, a quantity you can calculate, and a way to check whether a result is plausible.

How should I study Truck-kun?

Read the excerpt, restate it from memory, then work through the examples and applications listed on this page. The five-step study plan above takes about twenty minutes.

What does this page cover?

It gives you a compact reference excerpt plus original lgStudy explanations, examples, applications and study material on Truck-kun.