Technical Information
| HTTP Status Code | 200 |
| HTTP Version | HTTP/1.1 |
| HTTPS | ✔ Available |
| IP Address | 49.212.243.40 |
| Server Software | nginx |
|
🕐 🟡 Slow Response (2006 ms) | Response time exceeds 1 second. Consider optimizing the server or using caching. |
|
ℹ 🔵 Missing HSTS | HTTP Strict Transport Security is not configured. Recommended for HTTPS sites. |
|
ℹ 🔵 Missing Content Security Policy | CSP is not configured. It helps prevent XSS attacks and content injection. |
|
ℹ 🔵 Missing X-Frame-Options | The site can be embedded in iframes by third parties (clickjacking risk). |
|
ℹ 🔵 No Compression | The server does not use Gzip or Brotli. Enable compression to reduce bandwidth usage. |
HTTP Status Code 200
HTTP Version HTTP/1.1
HTTPS ✔ Available
IP Address 49.212.243.40
Server Software nginx
🕐 🟡 Slow Response (2006 ms) Response time exceeds 1 second. Consider optimizing the server or using caching.
ℹ 🔵 Missing HSTS HTTP Strict Transport Security is not configured. Recommended for HTTPS sites.
ℹ 🔵 Missing Content Security Policy CSP is not configured. It helps prevent XSS attacks and content injection.
ℹ 🔵 Missing X-Frame-Options The site can be embedded in iframes by third parties (clickjacking risk).
ℹ 🔵 No Compression The server does not use Gzip or Brotli. Enable compression to reduce bandwidth usage.
Redirect Chain
| # | URL | HTTP Status Code | Status |
| 1 | https://kspub.co.jp:443 | 301 | HTTP/2 301 |
| 2 | https://www.kspub.co.jp/ | 200 | HTTP/2 200 |
#1 URL https://kspub.co.jp:443
HTTP Status Code 301
Status HTTP/2 301
#2 URL https://www.kspub.co.jp/
HTTP Status Code 200
Status HTTP/2 200
Performance
| DNS Lookup | 654.1 ms |
| TCP Connect | 923.6 ms |
| TLS Handshake | 273.1 ms |
| Time To First Byte (TTFB) | 1466.8 ms |
| Content Download | 538.7 ms |
| Total Response Time | 2005.6 ms |
DNS Lookup 654.1 ms
TCP Connect 923.6 ms
TLS Handshake 273.1 ms
Time To First Byte (TTFB) 1466.8 ms
Content Download 538.7 ms
Total Response Time 2005.6 ms
Security
| HTTPS | ✔ Enabled |
| HSTS | ✘ Not configured |
| CSP | ⚠ Not configured |
| X-Frame-Options | ⚠ Not configured |
| X-Content-Type-Options | ⚠ Not configured |
| HTTP/2 | ⚠ HTTP/1.1 |
HTTPS ✔ Enabled
HSTS ✘ Not configured
CSP ⚠ Not configured
X-Frame-Options ⚠ Not configured
X-Content-Type-Options ⚠ Not configured
HTTP/2 ⚠ HTTP/1.1
SEO Quick Check
Detected Technologies
| Technology | Google Analytics Google Tag Manager Nginx |
Technology Google Analytics Google Tag Manager Nginx
HTTP Headers
| Server
| nginx |
| Date
| Thu, 20 Aug 2026 07:48:43 GMT |
| Content-type
| text/html |
| Content-length
| 56924 |
| Last-modified
| Thu, 13 Aug 2026 02:42:14 GMT |
| Etag
| "de5c-658e4a6d23879" |
| Accept-ranges
| bytes |
Meta Tags
| Keywords | 講談社サイエンティフィク,出版,自然科学,数学,採用 |
| Description | 自然科学の書籍の出版・企画を行っております。 |
| Viewport | width=device-width |
Server nginx
Date Thu, 20 Aug 2026 07:48:43 GMT
Content-type text/html
Content-length 56924
Last-modified Thu, 13 Aug 2026 02:42:14 GMT
Etag "de5c-658e4a6d23879"
Accept-ranges bytes
