NTT, Inc.

Tokyo – October 12, 2026 -- NTT, Inc. has cut the maximum relative error of sensor-based CO2 absorption monitoring in microalgae cultures from approximately 3,300% to approximately 8%, measured against the conventional titration method.

The technology calculates dissolved inorganic carbon (DIC) concentrations from CO2 and other sensor readings. It does not require sampling the culture fluid for each measurement. The results were published in the journal Algal Research on August 12, 2026.

Titration is accurate but cannot deliver continuous data

Evaluating microalgal CO2 absorption means tracking DIC, which exists in culture fluid as dissolved CO2, bicarbonate ions and carbonate ions. Titration measures DIC accurately, but every reading requires a fluid sample and takes time and effort, so it does not suit continuous data acquisition.

France -- NTT, Inc. signed a Memorandum of Understanding on September 17, 2026, with France-based photonics company Cailabs to explore direct optical links between satellite networks and terrestrial data infrastructure.

NTT would integrate coherent and network control technology into Cailabs ground stations

The companies will examine adding NTT's digital coherent technology and network control technology to Cailabs' optical ground stations (OGS). They will also study connecting selected stations to nearby NTT data centers over NTT's All-Photonics Network (APN).

The network control technology automatically bypasses ground stations rendered inoperable by weather and coordinates multiple stations with the APN to keep communication reliable.

Japan – October 12, 2026 -- NTT, Inc. repurchased 94,237,900 shares of its common stock for 16,460,974,290 yen between September 1 and September 30, 2026, lifting its cumulative buyback to 77,588,530,910 yen under a program capped at 200 billion yen.

NTT executed September purchases on the Tokyo Stock Exchange

All shares were acquired on the Tokyo Stock Exchange. The September volume works out to an average price of roughly 174.7 yen per share, based on the disclosed share count and total amount.

Cumulative buyback reaches 491.6 million shares since May

As of September 30, 2026, NTT had repurchased 491,571,000 shares under the resolution its Board of Directors approved on May 8, 2026. The cumulative average price is roughly 157.8 yen per share, calculated from the disclosed figures.