It is thought to be one of the earliest predators, catching small prey with its nematocysts as modern cnidarians do. The apparent suddenness of the event may however be an artefact of the fossil record, rather than showing that all these animals appeared simultaneously. The first body fossils of animals appear in the Ediacaran, represented by forms such as Charnia and Spriggina.

• Japan has the lowest rate of heart disease in the OECD, and the lowest level of dementia among developed countries.
• It spent 1.4% of its total GDP on its defense budget and maintained the tenth-largest military budget in the world in 2025.
• The prime minister as the head of government has the power to appoint and dismiss Ministers of State, and is appointed by the emperor after being designated from among the members of the Diet.
• Other minority religions include Hinduism, Judaism, and Baháʼí Faith, as well as the animist beliefs of the Ainu.
• The resignation of the shōgun led to the Boshin War and the establishment of a centralized state nominally unified under the emperor (the Meiji Restoration).
• It consists of a lower House of Representatives with 465 seats, elected by popular vote every four years or when dissolved, and an upper Senate with 248 seats, whose popularly elected members serve six-year terms.

Since 1973, all elderly persons have been covered by government-sponsored insurance. People without insurance through employers can participate in a national health insurance program administered by local governments. Payment for personal medical services is offered through a universal health insurance system that provides relative equality of access, with fees set by a government committee. Other minority religions include Hinduism, Judaism, and Baháʼí Faith, as well as the animist beliefs of the Ainu. Throughout the latest century, Western customs originally related to Christianity, including Western style weddings, Valentine’s Day and Christmas, have become popular as secular customs among many Japanese.
In the classical era, Aristotle divided animals,d based on his own observations, into those with blood (roughly, the vertebrates) and those without. The chordates are dominated by the vertebrates (animals with backbones), which consist of fishes, amphibians, reptiles, birds, and mammals. Most protostomes have schizocoelous development, where cells simply fill in the interior of the gastrula to form the mesoderm. Most appear to belong to two major lineages, the protostomes and the deuterostomes.

• Between the 4th and 6th centuries, its kingdoms were united under an emperor in Nara and later in Heian-kyō.
• However, Japan’s video game sector remains a major industry; in 2014, Japan’s consumer video game market grossed $9.6 billion, with $5.8 billion coming from mobile gaming.
• English has taken a major role in Japan as a business and international link language, and is a compulsory subject at the junior and senior high school levels.
• Some medicines such as the cancer drug trabectedin are based on toxins or other molecules of animal origin.
• Japanese cuisine offers a vast array of regional specialties that use traditional recipes and local ingredients.

Foreign relations

Japan ranked seventh in the world in tonnage of fish caught and captured 3,167,610 metric tons of fish in 2016, down from an annual average of 4,000,000 tons over the previous decade. As the central coordinating body for the Prefectural Police Departments, the National Police Agency is administered by the National Public Safety Commission. The deployment of troops to Iraq and Afghanistan marked the first overseas use of Japan’s military since World War II. The country’s military, the Japan Self-Defense Forces (JSDF), is restricted by Article 9 of the Japanese Constitution, which renounces Japan’s right to declare war or use military force in international disputes. Japan is widely considered to be a great power due to its economic power and political, cultural, and military influence. The broadly conservative Liberal Democratic Party has been the dominant party in the country since the 1950s, often called the 1955 System.
Popular Japanese beverages include sake, a brewed rice beverage that typically contains 14–17% alcohol and is made by multiple fermentation of rice. Japanese cuisine offers a vast array of regional specialties that use traditional recipes and local ingredients. Beginning in 2000, Japan implemented the Happy Monday System, which moved a number of national holidays to Monday in order to obtain a long weekend. Public holidays in Japan are regulated by the Public Holiday Law (国民の祝日に関する法律, Kokumin no Shukujitsu ni Kansuru Hōritsu) of 1948.
Animals that eat both plants and meat are called omnivores. Other animals eat only meat and are called carnivores. Some animals eat only plants; they are called herbivores. The animal mode of nutrition is called heterotrophic because they get their food from other living organisms. Also, the cells of animals have different cell membranes to other eukaryotes like plants and fungi.

Crappie Fish

Japan is an ethnically and culturally homogeneous society, with the Japanese people forming 97.4% of the country’s population. On April 1, 2019, Japan enacted its revised immigration law, protecting the rights of foreign workers to help reduce labor shortages in certain sectors. The country has therefore aimed to diversify its sources and maintain high levels of energy efficiency. The high-speed Shinkansen (bullet trains) that connect major cities are known for their safety and punctuality. The explorer entered a lunar orbit on October 4, 2007, and was deliberately crashed into the Moon on June 11, 2009. Japan’s plans in space exploration include building a Moon base and landing astronauts by 2030.

Modern era

The earliest works of Japanese literature include the Kojiki and Nihon Shoki chronicles and the Man’yōshū poetry anthology, all from the 8th century and written in Chinese characters. Japan has the lowest rate of heart disease in the OECD, and the lowest level of dementia among developed countries. Since 1981, the principal cause of death in Japan is cancer, which accounted for 27% of the total deaths in 2018—followed by cardiovascular diseases, which led to 15% of the deaths.
The Jinshin War of 672, a bloody conflict between Prince Ōama and his nephew Prince Ōtomo, became a major catalyst for basswin further administrative reforms. The true aim of the reforms was to bring about greater centralization and to enhance the power of the imperial court, which was also based on the governmental structure of China. It nationalized all land in Japan, to be distributed equally among cultivators, and ordered the compilation of a household registry as the basis for a new system of taxation.

The Pacific coast features a humid subtropical climate that experiences milder winters with occasional snowfall and hot, humid summers because of the southeast seasonal wind. The mountains of the Chūgoku and Shikoku regions shelter the Seto Inland Sea from seasonal winds, bringing mild weather year-round. The northernmost region, Hokkaido, has a humid continental climate with long, cold winters and very warm to cool summers. The climate of Japan is predominantly temperate but varies greatly from north to south. It has the 17th highest natural disaster risk as measured in the 2016 World Risk Index.

Red-Billed Quelea Bird

Japan is the second highest-ranked Asian country in the 2025 Global Peace Index. Japan has close economic and military relations with the United States, with which it maintains a security alliance. Statutory law originates in the legislature, and the constitution requires that the emperor promulgate legislation passed by the Diet without giving him the power to oppose legislation.