Introduction to Club Acquired in Japan: BRIDGESTONE / REYGRANDE RG4 Iron Set

This golf club set is the RG-4 Iron Set from the Reygrande brand, which was developed by BRIDGESTONE.

Brand Name/Model Name: Reygrande RG-4
Manufacturer: Bridgestone Sports Co., Ltd.
Technology: The club head's cavity features the inscription "EXTRA DEEP CAVITY," a design intended to set the center of gravity low and deep. This technology aims to enhance the ease of launching the ball (high trajectory) and increase forgiveness for off-center hits (making it "easier" to use).
Club Numbers: The set shown in the photo includes 6 clubs: 6, 7, 8, 9, P (Pitching Wedge), and S (Sand Wedge).
Shaft: While detailed information is unavailable, this model is often fitted with an original carbon shaft, typically one named "Harmotec Flow."
Positioning: The Reygrande brand was a model line offered by Bridgestone. The RG-4 is presumed to be a design that emphasizes ease of use, targeting relatively new or average golfers.