diff -urN numpy-1.19.4.org/numpy/distutils/fcompiler/fujitsu.py numpy-1.19.4/numpy/distutils/fcompiler/fujitsu.py
--- numpy-1.19.4.org/numpy/distutils/fcompiler/fujitsu.py	1970-01-01 09:00:00.000000000 +0900
+++ numpy-1.19.4/numpy/distutils/fcompiler/fujitsu.py	2020-11-10 17:21:43.324928283 +0900
@@ -0,0 +1,40 @@
+from numpy.distutils.fcompiler import FCompiler
+
+compilers = ['FujitsuFCompiler']
+
+class FujitsuFCompiler(FCompiler):
+    compiler_type = 'fujitsu'
+    description = 'Fujitsu Fortran Compiler'
+
+    possible_executables = ['frt']
+    version_pattern = r'frt \(FRT\) (?P<version>[a-z\d.]+)'
+    # $ frt --version
+    # frt (FRT) x.x.x yyyymmdd
+
+    executables = {
+        'version_cmd'  : ["<F77>", "--version"],
+        'compiler_f77' : ["frt", "-Fixed"],
+        'compiler_fix' : ["frt", "-Fixed"],
+        'compiler_f90' : ["frt"],
+        'linker_so'    : ["frt", "-shared"],
+        'archiver'     : ["ar", "-cr"],
+        'ranlib'       : ["ranlib"]
+        }
+    pic_flags = ['-KPIC']
+    module_dir_switch = '-M'
+    module_include_switch = '-I'
+
+    def get_flags_opt(self):
+        return ['-O3']
+    def get_flags_debug(self):
+        return ['-g']
+    def runtime_library_dir_option(self, dir):
+        return f'-Wl,-rpath={dir}'
+    def get_libraries(self):
+        return ['fj90f', 'fj90i', 'fjsrcinfo']
+
+if __name__ == '__main__':
+    from distutils import log
+    from numpy.distutils import customized_fcompiler
+    log.set_verbosity(2)
+    print(customized_fcompiler('fujitsu').get_version())
diff -urN numpy-1.19.4.org/numpy/distutils/fcompiler/__init__.py numpy-1.19.4/numpy/distutils/fcompiler/__init__.py
--- numpy-1.19.4.org/numpy/distutils/fcompiler/__init__.py	2020-11-09 10:51:35.693490207 +0900
+++ numpy-1.19.4/numpy/distutils/fcompiler/__init__.py	2020-11-16 17:48:49.316744476 +0900
@@ -746,7 +746,7 @@
                'intelvem', 'intelem', 'flang')),
     ('cygwin.*', ('gnu', 'intelv', 'absoft', 'compaqv', 'intelev', 'gnu95', 'g95')),
     ('linux.*', ('gnu95', 'intel', 'lahey', 'pg', 'nv', 'absoft', 'nag', 'vast', 'compaq',
-                 'intele', 'intelem', 'gnu', 'g95', 'pathf95', 'nagfor')),
+                 'intele', 'intelem', 'gnu', 'g95', 'pathf95', 'nagfor', 'fujitsu')),
     ('darwin.*', ('gnu95', 'nag', 'absoft', 'ibm', 'intel', 'gnu', 'g95', 'pg')),
     ('sunos.*', ('sun', 'gnu', 'gnu95', 'g95')),
     ('irix.*', ('mips', 'gnu', 'gnu95',)),