It takes about 7 minutes from the station on foot. The exit of Saitama-shintoshin station is only one. After you go out the ticket gate, you can see “Doutor” coffee shop in front of the right. Please go down the escalator in front of the coffee shop. Then, please turn to the left at the bottom of the escalator. Finally, please go straight ahead, and you arrive our school at the right side of the street in five minutes on foot.
For your reference, please see Saitama-shintoshin station map！