science

Ne-no-kuni

Ne-no-kuni 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 Ne-no-kuni rather than just read about it. In short: Ne-no-kuni (根の国; lit. "Land of roots; Land of origin") or Soko-tsu-ne-no-kuni (底根之國; lit. "Distant land of roots") in the Nihon Shoki, also called Ne-no-kata-su-kuni (根之堅洲國; lit. "Borderland of roots") or Haha-no-kuni (妣國; lit. "Land of my late mother") in the Kojiki, refers to a netherworld in Japanese mythology. It is sometimes considered to be identical to Yomi, another netherworld in the myths as well as Tokoyo…

Key takeaways

Ne-no-kuni belongs to science; place it in that map before memorising details.
Learn the definition first, then one example that makes the definition concrete.
Connect Ne-no-kuni to a quantity you can measure, compute or draw — that is where exam questions come from.
Reproduce the core statement of Ne-no-kuni from memory before moving on to harder problems.

Reference excerpt

Ne-no-kuni (根の国; lit. "Land of roots; Land of origin") or Soko-tsu-ne-no-kuni (底根之國; lit. "Distant land of roots") in the Nihon Shoki, also called Ne-no-kata-su-kuni (根之堅洲國; lit. "Borderland of roots") or Haha-no-kuni (妣國; lit. "Land of my late mother") in the Kojiki, refers to a netherworld in Japanese mythology. It is sometimes considered to be identical to Yomi, another netherworld in the myths as well as Tokoyo no kuni (常世国; lit. "Eternal land"). There is no clear consensus on the relationship between these three realms. The god Susanoo is described as the ruler of Ne-no-kuni. There are differing accounts on how he assumed this position: According to the Kojiki when Izanagi tasked his children with the rule over the various realms: Amaterasu got the "Plain of the High Heaven" (Takamagahara), Tsukuyomi got the "Dominion of the Night" (Yoru-no-wosu-kuni), and Susanoo got the "Sea Plain" (海原, Una-bara). Susanoo ignored this command and kept crying over the loss of his dead mother Izanami, such that his weeping led to death and destruction. As Susanoo wished, Izanagi expelled him to be near his mother in Ne-no-kata-su-kuni. In the previous episodes about Izanami's death this land is called Yomi. The Nihon Shoki mentions Ne-no-kuni in passing when describing an episode where Susanoo was banished from Takama-ga-hara for various evil acts he committed, and went to a place called (Soko-tsu-)Ne-no-kuni. According to the Kojiki when Ōkuninushi visited Ne-no-kuni and insulted Susanoo he was submitted to overcome three ordeals, one being described to sleep in a house infested with snakes, centipedes and wasps. This is sometimes taken as another hint that Ne-no-kuni is a subterranean realm. One explanation of the myth contrasts the trials of Ōkuninushi to a symbolic death through rites of initiation that cause one to become reborn into a new life. In this story, death does not pollute; it regenerates. The land of the dead also contains the forces of life, tama. The Michiae no matsuri (道饗祭) norito is an ancient Shinto prayer asking the gods to prevent the evil beings from Ne-no-kuni-Soko-no-kuni (根國底國) to do any harm. The Minatsuki no tsugomori no ōharae (no norito) (六月晦大祓[祝詞]), also short Ōharae no kotoba (大祓詞), which is performed in the great purification (harae) ceremony of the sixth month locates Ne-no-kuni-Soko-no-kuni in the "Great Sea Plain" (大海原, Ō-una-bara), i.e. the ocean. Kunio Yanagita compared Ne no Kuni to the Nirai Kanai of the Ryukyuan religion. This paradisical land is situated beyond the seas.

References

Worked examples

Example 1 — a first encounter with Ne-no-kuni

Start with the simplest possible case. Write down what Ne-no-kuni 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 Ne-no-kuni 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 Ne-no-kuni 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 Ne-no-kuni

In research: Ne-no-kuni 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 Ne-no-kuni 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: Ne-no-kuni is common in secondary-school and first-year university syllabi. It links to neighbouring topics Afterlife places, Mythological places, Places in Japanese mythology, so understanding it makes those chapters shorter.
In everyday life: Look for Ne-no-kuni 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 Ne-no-kuni in 20 minutes

Read the reference excerpt below once, without taking notes.
Close the page and write down what Ne-no-kuni 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 Ne-no-kuni out loud to somebody else — or to Teacher Smith in the lgStudy chat.

Frequently asked questions

What is Ne-no-kuni in simple terms?

Why does Ne-no-kuni 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 Ne-no-kuni?

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 Ne-no-kuni.