--- a/doc/embed.scm
+++ b/doc/embed.scm
@@ -1,3 +1,4 @@
+(use gauche.charconv)
 (use gauche.regexp)
 (define (escape str)
   (set! str (regexp-replace-all #/&/ str "&"))
@@ -15,12 +16,18 @@
 (define (main args)
   (call-with-input-file (cadr args)
     (lambda (in)
-      (let* ((content (port->string in))
+      (let* ((content (port->string (open-input-conversion-port in "*jp")))
              (content (regexp-replace-all #/#\{(.*?)\}/ content
                                           (lambda (m)
                                             (string-append 
                                              "<pre>\n"
                                              (read-file-and-escape (rxmatch-substring m 1))
-                                             "</pre>\n")))))
+                                             "</pre>\n"))))
+             (content (regexp-replace #/(encoding=").*?(")/ content
+                                      (lambda (m)
+                                        (string-append
+                                         (rxmatch-substring m 1)
+                                         (ces-guess-from-string content "*jp")
+                                         (rxmatch-substring m 2))))))
         (display content))))
   0)