A research team has developed a neuron device that holds potential for application in large-scale, high-speed superconductive neural network circuits. The device operates at high speeds with ultra-low-power consumption and is tolerant to parameter fluctuations during circuit fabrication.

Study Overview

Professor Kenzo Kaifu and Research Fellow Hiromi Shiraishi of Chuo University, together with Professor Yu-Shan Han of National Taiwan University, conducted the world’s first quantitative study to reveal the global consumption structure of freshwater eels (genus Anguilla). The research team combined DNA barcoding of eel products—purchased from retail stores and restaurants worldwide—with production and trade statistics to estimate species composition at the global level. Their findings were published in Scientific Reports on August 15, 2025.

Key Findings

First global assessment of eel consumption integrating DNA barcoding with production and trade statistics.

More than 99% of global eel consumption consists of three threatened species (American eel, Japanese eel, and European eel) listed in the IUCN Red List.

East Asia accounts for the majority (64–85%) of global eel consumption, with Japan ranking first in per capita supply.

The American eel is the most consumed species worldwide, followed by the Japanese eel and the European eel.

Large discrepancies (up to 2.4-fold) between international statistics reveal serious gaps in eel production and trade data.

Researchers at Tohoku University have taken a major step forward in the global hunt for dark matter, an invisible substance that makes up about 27% of the universe, by designing a new type of quantum sensor network that could significantly improve our chances of detecting it.

Osaka Metropolitan University researchers developed yeast that efficiently adsorbs targeted rare earth elements.

Kyoto, Japan -- For people with medical conditions, stigma is a real problem they must worry about on top of their health. Stereotypes about health conditions often cause discrimination even by healthcare providers, as many may assume those affected don't take care of their health, when in reality they likely have no control over their condition.

Diabetes affects nearly ten percent of the global adult population and causes almost two million deaths per year, yet the persistent stigma surrounding people with the disease is a global concern. Physicians may act as inadvertent perpetrators, but their level of awareness is still poorly understood.

To address this, it is essential to gauge the level of awareness of a diabetes stigma among future physicians and identify the need for strategic interventions in medical education. This approach motivated a team of researchers at Kyoto University to first assess awareness of stigma and advocacy among medical students in Japan.

Researchers at the RIKEN Center for Brain Science (CBS) in Japan report a link between deep sleep and cerebrospinal fluid, the clear liquid that surrounds and supports the brain and spinal cord. The study demonstrates how changes in cerebrospinal fluid signals during sleep—as measured by fMRI—are time-locked to slow brain waves and other neural events. These findings, published in PNAS, offer a clue as to why stable sleep is important for normal brain function, particularly within the brain network that controls learning and memory.

Stinkbug’s “ears on the legs” are actually “symbiotic organs” that nurture specific fungi for guarding eggs against enemies.

In the search for eco-friendly alternatives to synthetic herbicides, researchers from Kyushu University, Japan, have identified a potent, weed-inhibiting compound in the leaves of the Manchurian walnut tree (Juglans mandshurica Maxim.). The discovery of the compound, 2Z-decaprenol, and its unique mode of action on plants could lead to the development of more sustainable herbicides. The study was published in the Journal of Agricultural and Food Chemistry.

Single-photon sources are key components of quantum communication technologies. However, conventional designs use decoupled single-photon emitters and photon transmission methods, resulting in high transmission loss, limiting practical applicability. Now, researchers from Japan have developed a new method, where a single rare-earth ion is used to generate and guide single photons directly within an optical fiber at room temperature. It is low cost and can become a key component of upcoming quantum communication technologies.