National Astronomical Observatory of Japan

GRAPE System

What is the GRAPE System

The GRAPE (GRAvity PipE) system is a computer specialized for gravitational N-body problems. It can quickly calculate the most computationally intensive gravitational interactions between particles in gravitational N-body problems. Currently, the Center for Computational Astrophysics operates GRAPE-DR and GRAPE-9.

GRAPE System


LocationMitaka Campus (Osawa, Mitaka, Tokyo, JAPAN)
Prime manufacturerThe University of Tokyo, Hamamatsu Metrix Co., Ltd., and K & F Computing Research Co.
Basic specifications of the GRAPE-9 systemNumber of nodes: 8
CPU: Intel Core i5 4670 3.4 GHz
Total main memory: 16 GB
Basic specifications of the GRAPE-DR systemNumber of nodes: 16
CPU: Intel Core i7 2600 K 3.4 GHz
Total Main Memory: 16 GB


FY 2006Center for Computational Astrophysics began operation of GRAPE-5 and GRAPE-6.
FY 2007GRAPE-7 began operation. GRAPE-5 ended operation.
FY 2009GRAPE-DR commissioning operations began.
FY 2010GRAPE-DR won first place in Green500.
FY 2012GRAPE-DR began full-scale operation.
FY 2014GRAPE-9 commissioning operations began. GRAPE-6 ended operation.
FY 2015GRAPE-9 began full-scale operation. GRAPE-7 ended operation.