diff --git a/tools/build/configure.py b/tools/build/configure.py
index 3c0992497b..1e77beaa09 100755
--- a/tools/build/configure.py
+++ b/tools/build/configure.py
@@ -29,12 +29,7 @@ def exec_shell(command: List[str]) -> str:
 
 def write_ninja_rules(ninja: ninja_syntax.Writer, cpp: str, extra_cppflags: str, extra_cflags: str, use_ccache: bool, shift: bool, debug: bool):
     # platform-specific
-    if sys.platform  == "darwin":
-        iconv = "tools/iconv.py UTF-8 $encoding"
-    elif sys.platform == "linux":
-        iconv = "iconv --from UTF-8 --to $encoding"
-    else:
-        raise Exception(f"unsupported platform {sys.platform}")
+    iconv = "iconv --from UTF-8 --to $encoding"
 
     ccache = ""
 
@@ -418,7 +413,7 @@ class Configure:
                     task = "cc_272"
                     cflags = cflags.replace("gcc_272", "")
 
-                encoding = "SHIFT-JIS"
+                encoding = "CP932" # similar to SHIFT-JIS, but includes backslash and tilde
                 if version == "ique":
                     encoding = "EUC-JP"
 
diff --git a/tools/iconv.py b/tools/iconv.py
deleted file mode 100755
index 9575a57043..0000000000
--- a/tools/iconv.py
+++ /dev/null
@@ -1,23 +0,0 @@
-#!/usr/bin/python3
-
-import argparse
-import sys
-
-parser = argparse.ArgumentParser(description='Convert a file from one encoding to another')
-parser.add_argument("f")
-parser.add_argument("t")
-parser.add_argument('infile', nargs='?', type=argparse.FileType('r'), default=sys.stdin)
-parser.add_argument('outfile', nargs='?', type=argparse.FileType('w'), default=sys.stdout)
-
-args = parser.parse_args()
-
-
-def main(args):
-    sys.stdin.reconfigure(encoding=args.f)
-    in_data = args.infile.read()
-    sys.stdout.reconfigure(encoding=args.t)
-    args.outfile.write(in_data)
-
-
-if __name__ == "__main__":
-    main(parser.parse_args())