Recent Results and Future Prospects of the Telescope Array Experiment and TA×4 Project

The Telescope Array (TA), the largest cosmic ray observatory in the northern hemisphere, utilizes batteries of fluorescence telescopes and an extensive array of scintillator surface detectors to measure the properties of extensive air showers produced by ultra-high energy cosmic rays (UHECRs) upon entering Earth's atmosphere. In response to indications of a Hotspot, a concentration in the arrival direction of UHECRs in the Telescope Array data, TA is currently undergoing expansion from 700 km² to 2800 km², known as the TA×4 project. This talk will cover the recent results and future prospects of both the TA and the TA×4 project.