e-kakashi Agricultural AI and Field Sensor Network

Greein Inc. is a Tokyo company founded in 2024 by the employees who developed and ran e-kakashi, an agricultural AI platform first released in 2015 and taken over from SoftBank in July 2024. It helps growers, cooperatives and agribusinesses turn field environment data into cultivation decisions.

The e-kakashi sensor network uses a solar-powered LTE gateway with GPS, rated IP55, connecting up to four sensors such as air temperature and humidity, soil temperature, moisture and EC, water depth, solar radiation and CO2. The e-kakashi Navi app combines 1 km-mesh weather with field data, forecasts soil moisture five days ahead, estimates growth stages and warns of stress, disease and pest risk. e-kakashi Analytics is a BI tool for managers and researchers, and ek recipes are shareable stage-based cultivation calendars. A hybrid AI based on plant physiology works with limited data.

• Solar LTE gateway: IP55 portable gateway with GPS, remote configuration and firmware updates.
• Multi-sensor support: air, soil moisture, EC, water depth, solar radiation and CO2 sensors.
• e-kakashi Navi app: field data, 1 km-mesh weather, growth stage estimates and work records.
• Forecasts and alerts: five-day soil moisture forecast, disease and pest risk, irrigation and spraying timing.
• e-kakashi Analytics: BI tool combining sensor data and work records across many fields.
• ek recipes: stage-based cultivation calendars with custom thresholds shared within a region.

• Agricultural cooperatives monitoring paddy water levels to apply alternate wetting and drying and report emissions.
• Greenhouse vegetable and strawberry growers in Lam Dong using soil moisture forecasts to schedule irrigation.
• Food companies entering contract farming that need standardised cultivation recipes and field data across suppliers.

• Better irrigation decisions; in a 2025 Tokachi trial, irrigated onion fields guided by e-kakashi data yielded up to 1.9 times more.
• For paddy, the company claims water management alerts can cut water use by 20% and methane by 40%.
• Easy deployment with a solar-powered, cable-free gateway that starts by inserting batteries.
• Captures expert growers' know-how as shareable recipes and analytics for extension staff.

Asian agriculture faces ageing farmers, climate variability and pressure to cut methane from paddy fields, driving demand for low-maintenance field sensors and data-driven advisory. Japanese smart agriculture tools are increasingly offered through government and development cooperation programmes, a channel relevant to Vietnam's high-tech and low-emission rice initiatives.

Greein Inc. was founded in April 2024 in Minato-ku, Tokyo, with capital of 200 million yen, and took over the e-kakashi business from SoftBank in July 2024. Shareholders include Yamatane Corporation and Agri Business Investment & Development Corporation. In October 2026 it formed a capital and business alliance with Sumitomo Mitsui Finance & Leasing. Its CEO has led overseas projects in Colombia, Brazil, Mongolia and Uzbekistan.