# BEGIN WordPress
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^index\.php$ – [L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>

# END WordPress

# BEGIN Lolipop [ http://lolipop.jp/manual/blog/wp-htaccess/ ]

<Files wp-login.php>
ErrorDocument 403 /lolipop_service_documents/wp-login-deny.html
Order deny,allow
Deny  from all
Allow from 175.108.112.111
</Files>

# END Lolipop

—————

Modification in .htaccess

——————————————————

RewriteBase /  　→　RewriteBase /en/

RewriteRule . /index.php [L]　→　RewriteRule . index.php [L]

———————————————

Moreover in Menu→Home→URL:  http://tokyoguide-noriko.net/en/

→ http://tokyoguide-noriko.net/

Also yo may better to check the permalink of the actual Home page.

Whole modification will make:

http://tokyoguide-noriko.net/en/  : not found