Eisuke Sako (英介サコ), also known as POLY-2 or SAKO. He played the synthesizer and used the vocoder in the Japanese rock band POLYSICS. He was well known for throwing bread into the audience at live shows.
- Stage Name: POLY-2, SAKO (サコ)
- Real Name: Eisuke Sako (英介サコ)
- Postition: Synthesizer and Vocoder
- Bands: POLYSICS (1997 - 1999)