science

In Hand

In Hand 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 In Hand rather than just read about it. In short: In Hand (Japanese: インハンド, Hepburn: In Hando) is a Japanese manga series written and illustrated by Ao Akato. It was serialized in Kodansha's seinen manga magazine Evening from October 2018 to November 2020, and in the Comic Days website from December 2024 to February 2025.

Key takeaways

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

Reference excerpt

In Hand (Japanese: インハンド, Hepburn: In Hando) is a Japanese manga series written and illustrated by Ao Akato. It was serialized in Kodansha's seinen manga magazine Evening from October 2018 to November 2020, and in the Comic Days website from December 2024 to February 2025. Its chapters were collected in six tankōbon volumes. An eleven-episode Japanese television drama adaptation was broadcast on TBS and its affiliates from April to June 2019. Akato launched two previous manga series in Kodansha's seinen manga magazine Monthly Afternoon; Nemesis no Tsue, published in 2013, and In Hand: Himokura Hakase to Majime na Migiude, published in 2016.

Plot

Media

Manga Before creating In Hand, Ao Akato launched a short manga series, titled Nemesis no Tsue (ネメシスの杖; 'Staff of Nemesis'), which ran in Kodansha's seinen manga magazine Monthly Afternoon from January 25 to June 25, 2013. Its chapters were collected in a single tankōbon volume, released on September 30, 2013. A three-chapter prologue miniseries, titled In Hand: Himokura Hakase to Majime na Migiude (インハンド紐倉博士とまじめな右腕; 'In Hand: Dr. Himokura and His Serious Right Arm'), was serialized in Monthly Afternoon from March 25 to May 25, 2016. Its chapters were collected in a single tankōbon volume, released on July 22, 2016. Both the miniseries and Nemesis no Tsue were republished in two volumes on February 22, 2019, under the title In Hand: Prologue (インハンドプロローグ, In Hando: Purorōgu). In Hand was serialized in Kodansha's seinen manga magazine Evening from October 23, 2018, to November 24, 2020. It was later revived in Kodansha's Comic Days website on December 12, 2024, where it was serialized until February 13, 2025. Kodansha collected its chapters in six tankōbon volumes, released from March 22, 2019, to March 12, 2025.

Volumes

Drama In Hand was adapted into a 11-episode Japanese television drama, which was broadcast on TBS from April 12 to June 21, 2019. It stars Tomohisa Yamashita as protagonist Dr. Tetsu Himokura, Gaku Hamada as assistant Haruma Takaya, and Nanao as politician Tomoe Makino.

See also Riū wo Machinagara, another manga series by the same author

References

External links Manga official website at Evening at the Wayback Machine (archived October 18, 2025) (in Japanese) Drama official website at TBS (in Japanese) In Hand (manga) at Anime News Network's encyclopedia

Worked examples

Example 1 — a first encounter with In Hand

Start with the simplest possible case. Write down what In Hand 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 In Hand 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 In Hand 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 In Hand

In research: In Hand 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 In Hand 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: In Hand is common in secondary-school and first-year university syllabi. It links to neighbouring topics 2013 manga, 2016 manga, 2018 manga, so understanding it makes those chapters shorter.
In everyday life: Look for In Hand 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 In Hand in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what In Hand 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 In Hand out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is In Hand in simple terms?

Why does In Hand 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 In Hand?

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 In Hand.