Infrastructure

· 9 checks — DNS, redirects, IPv6, crawlability, URL variants, and domain intelligence rolled into one auditable list.

SCORE

GRADE

FIX

REVIEW

PASS

INFO

Probed from Amsterdam, Netherlands

301 Moved Permanently

Checks

1 PASS 6 REVIEW 1 FIX

CDN & Delivery

Action

No CDN detected

FIX

No CDN detected

A CDN can significantly improve load times for users around the world by caching content at edge nodes closer to them.

No CDN detected

Consider using a CDN to improve global delivery speed and reduce origin load.

Redirect Chain

1 redirect(s), 1655 ms total

REVIEW

1 redirect(s), 1655 ms total

Single redirect

Got: https://tv-asahi.co.jp → https://www.tv-asahi.co.jp/ (301)

WWW normalization redirect

Redirect overhead: 1655 ms total

Got: 1655 ms

https://tv-asahi.co.jp

905 ms · HTTP/1.1

301

https://www.tv-asahi.co.jp/

750 ms · HTTP/1.1 FINAL

#	URL	Status	Time	Protocol	Server
1	https://tv-asahi.co.jp	301	905 ms	HTTP/1.1	nginx/1.14.1
2	https://www.tv-asahi.co.jp/	200	750 ms	HTTP/1.1	nginx

See the visual redirect chain in the HTTP Probe tab →

IPv6 Readiness

Action

No IPv6 support

REVIEW

No IPv6 support

No IPv6 (AAAA) records found

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

No IPv6 Support

About 40% of internet users have IPv6. Consider adding AAAA records.

IPv6 support is increasingly important for global accessibility. About 40% of internet users have IPv6 connectivity.

Why this matters

No AAAA records — same impact as 'no IPv6 (AAAA) records'; IPv6-preferring clients pay extra latency falling back to IPv4.

Source: Google IPv6 stats

Crawlability

Action

robots.txt present, sitemap with 0 URLs

REVIEW

robots.txt present, sitemap with 0 URLs

robots.txt is present

Got: 10032 bytes

sitemap.xml is present

sitemap.xml contains invalid XML

Search engines may not be able to parse the sitemap. Fix XML validation errors.

sitemap.xml is empty — no URLs found

An empty sitemap provides no value. Add <url> entries for your pages.

robots.txt does not reference a sitemap

Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

Search engines may not be able to parse the sitemap. Fix XML validation errors.

Why this matters

An unparseable sitemap is silently ignored by Google — the URLs it advertises are never queued for crawl.

Learn more ▾

Google's sitemap parser is strict about XML validity. A single unescaped `&` or unclosed tag invalidates the whole file. Run your sitemap through a validator (Search Console's Sitemaps report flags it) and fix the offending entry. Most generators escape correctly; mistakes usually come from manually-written entries.

Source: sitemaps.org / Google Search Central

An empty sitemap provides no value. Add <url> entries for your pages.

Why this matters

An empty sitemap signals 'no content to index' to Google — actively harmful versus having no sitemap at all.

Learn more ▾

Google compares URLs in the sitemap against URLs it has crawled. An empty sitemap on a site with thousands of pages signals abandonment. Either populate it correctly (most CMSes auto-generate) or delete the file and let Google crawl normally.

Source: Google Search Central / sitemaps.org

Add a 'Sitemap:' directive to robots.txt so search engines can discover your sitemap.

Why this matters

robots.txt omits Sitemap: directive — crawlers must fetch /sitemap.xml by convention; reliable but missing the explicit hint.

Source: sitemaps.org

robots.txt 200 OK

Size 10032 B Sitemaps referenced 0 User-agents Blocking No — crawling allowed

<!doctype html>
<html class="no-js" lang="ja">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>テレビ朝日</title>
  <meta name="copyright" content="Copyright(C) tv asahi All rights reserved.">
  <meta name="description" content="テレビ朝日公式ホームページ。番組の最新情報やニュース、イベントや映画などテレビ朝日に関する様々な情報をお届けします。">
  <meta name="keywords" content="テレビ朝日,テレ朝,朝日,TV,テレビ,番組,六本木">
  <meta property="og:title" content="テレビ朝日">
  <meta property="og:type" content="website">
  <meta property="og:url" content="https://www.tv-asahi.co.jp/">
  <link rel="preload" crossorigin href="/Top24/assets/resources.json" as="fetch">
  <script type="module" crossorigin src="/Top24/assets/index.js"></script>
  <link rel="stylesheet" crossorigin href="/Top24/assets/index.css">
</head>
<body>
  <div id="root"></div>
  <script>
    var TOP_DATA = TOP_DATA2 = {};
    TOP_DATA2 = {ichioshi: {header:'イチオシ',createdAt:'2026/04/23 00:00',items: [{title:'相葉ヒロミのお困りですカー? 2時間SP',subtitle:'4月23日(木)よる7:00',text:'',url:'/okomaridesucar/',image:'/Top16/cms/push/03723/01.jpg',}, {title:'木曜ドラマ『未解決の女 警視庁文書捜査官 Season３』',subtitle:'毎週木曜よる9:00',text:'',url:'/mikaiketsu03/',image:'/Top16/cms/push/03723/02.jpg',}, {title:'アメトーーク!',subtitle:'毎週木曜よる11:15',text:'',url:'/ametalk/',image:'/Top16/cms/push/03723/03.jpg',}, {title:'ザワつく！金曜日',subtitle:'毎週金曜よる6:50',text:'',url:'/zawatsukufriday/',image:'/Top16/cms/push/03723/04.jpg',}, {title:'有働イノッチの探険!世界遺産',subtitle:'4月24日(金)よる8:00',text:'',url:'',image:'/Top16/cms/push/03723/05.jpg',}, {title:'CHEF-1グランプリ2026',subtitle:'4月26日(日)よる6:30',text:'',url:'https://chef-1gp.com/',image:'/Top16/cms/push/03723/06.jpg',}, ], }, banner: {header:'バナー',createdAt:'2026/03/06 05:00',items: [{image:'/Top16/cms/banner/00244/01.png',url:'https://tdp.tv-asahi.co.jp/tdp_spring2026/',label:'TOKYO_DREAM_PARK_開業記念_有明春祭り',}, ], }, onAir: {header:'番組表',createdAt:'2026/04/23 04:55',items: [{onNow:false,date:'2026/04/23',time:'04:00',name:'おはよう!時代劇　暴れん坊将軍6　#31',description:'「男と女の夢舞台」松平健[ほか]▽芝居見物に出かけた帰り、覆面姿の数人の男に襲われている侍二人を助けた吉宗。手傷を負った彼らをめ組に連れ帰り、襲われたわけを問うが…',url:'',streaming: [], }, {onNow:true,date:'2026/04/23',time:'04:55',name:'グッド!モーニング',description:'突然「停戦延長」なぜ…トランプ氏手詰まり?▽消費税「1%」浮上▽岩手・大槌町で山火事約2000人に避難指示▽安い「あら」活用術▽天下人が愛した茶器[ほか]',url:'http://www.tv-asahi.co.jp/goodmorning/',streaming: [], }, {onNow:false,date:'2026/04/23',time:'08:00',name:'羽鳥慎一モーニングショー',description:'首都圏最大ダムが過去最低レベルの渇水に…沈んだ村が姿あらわす▽働き方!!昭和VS令和　「風邪は土日にひけ」いやいや秒で辞めます',url:'http://www.tv-asahi.co.jp/m-show/',streaming: [], }, ], }, broadcast: {header:'配信コンテンツ',createdAt:'2026/04/13 15:22',items: [{url:'https://www.telasa.jp/series/15259?utm_source=tvasahihp&utm_medium=web&utm_campaign=ex_top_hanyu_echoes&argument=ftz0L766&dmai=a67bd584fbf09c',image:'/Top16/cms/douga/1194.png',title:'Yuzuru Hanyu ICE STORY 3rd “Echoes of Life” TOUR【マルチアングルカメラ】',subtitle:'',text:'',videos: [{type:'TELASA',url:'https://www.telasa.jp/series/15259?utm_source=tvasahihp&utm_medium=web&utm_campaign=ex_top_hanyu_echoes&argument=ftz0L766&dmai=a67bd584fbf09c',}, ], }, {url:'https://tver.jp/series/srskkomxag',image:'/Top16/cms/douga/1036.jpg',title:'土屋太鳳＆佐藤勝利W主演「ボーダレス～広域移動捜査隊～」無料配信中！',subtitle:'',text:'',videos: [{type:'TVer',url:'https://tver.jp/series/srskkomxag',}, ], }, {url:'https://www.tv-asahi.co.jp/douga_mv/kyoccorohee2026/?official=top',image:'/Top16/cms/douga/1238.jpg',title:'齊藤京子×ヒコロヒーが東京ドリームパークで腹くくって最後に○○するライブ',subtitle:'',text:'',videos: [{type:'TA_DOUGA',url:'https://www.tv-asahi.co.jp/douga_mv/kyoccorohee2026/?official=top',}, ], }, {url:'https://www.tv-asahi.co.jp/douga_mv/ame-live2026/?official=top',image:'/Top16/cms/douga/1237.jpg',title:'アメトーーク！初アリーナLIVE　来ないなんてありえなーーい2026',subtitle:'',text:'',videos: [{type:'TA_DOUGA',url:'https://www.tv-asahi.co.jp/douga_mv/ame-live2026/?official=top',}, ], }, ], }, buzzdogaTV: {header:'テレ朝公式YouTube「動画、はじめてみました」再生数ランキング',createdAt:'2026/04/17 10:03',items: [{title:'【スクールゾーン】ベテランデリヘルドライバー#神速49秒 #お笑い #夜職 #あるある #ノンフィクション #最速 #まい賞 #おすすめバラエティ #49秒グランプリ #shorts',subtitle:'1位',image:'https://i.ytimg.com/vi/cZAjBjGJCGY/mqdefault.jpg',url:'https://www.youtube.com/watch?v=cZAjBjGJCGY',}, {title:'たつろうが性癖暴露#神速49秒 #お笑い #夜職 #あるある #ノンフィクション #最速 #まい賞 #おすすめバラエティ #49秒グランプリ #shorts',subtitle:'2位',image:'https://i.ytimg.com/vi/Vf0Bv0o_5d4/mqdefault.jpg',url:'https://www.youtube.com/watch?v=Vf0Bv0o_5d4',}, {title:'【いわたまあり】闇が出るコンカフェ嬢#神速49秒 #お笑い #夜職 #あるある #ノンフィクション #最速 #まい賞 #おすすめバラエティ #49秒グランプリ #shorts',subtitle:'3位',image:'https://i.ytimg.com/vi/SltxX7g_Ls4/mqdefault.jpg',url:'https://www.youtube.com/watch?v=SltxX7g_Ls4',}, {title:'【たつろう】ホストのBBQ#神速49秒 #お笑い #夜職 #あるある #ノンフィクション #最速 #まい賞 #おすすめバラエティ #49秒グランプリ #shorts',subtitle:'4位',image:'https://i.ytimg.com/vi/AA8_o4DtCro/mqdefault.jpg',url:'https://www.youtube.com/watch?v=AA8_o4DtCro',}, {title:'【たつろう】面白くないが楽しいホスト#神速49秒 #お笑い #夜職 #あるある #ノンフィクション #最速 #まい賞 #おすすめバラエティ #49秒グランプリ #shorts',subtitle:'5位',image:'https://i.ytimg.com/vi/2d91vbjrDV8/mqdefault.jpg',url:'https://www.youtube.com/watch?v=2d91vbjrDV8',}, ], }, tvasahiNews: {header:'テレ朝NEWS',createdAt:'2026/04/23 06:47',items: [{title:'米報道官　停戦延長「期限設けず」 大統領が決定　イランの拿捕は停戦違反ではない',subtitle:'2026-04-23 06:47:36',text:'',image:'https://news.tv-asahi.co.jp/articles_img/000500535_640.jpg',url:'https://news.tv-asahi.co.jp/news_international/articles/000500535.html',}, {title:'東京メトロ銀座線　発煙で13時間運転見合わせ　23日朝は始発から平常運転',subtitle:'2026-04-23 06:15:37',text:'',image:'https://news.tv-asahi.co.jp/articles_img/000500524_640.jpg',url:'https://news.tv-asahi.co.jp/news_society/articles/000500524.html',}, {title:'EXILE MATSU「大好きなお酒も辞めています」ライブのために禁酒',subtitle:'2026-04-22 21:00:00',text:'',image:'https://news.tv-asahi.co.jp/articles_img/900188995_640.jpg',url:'https://news.tv-asahi.co.jp/news_geinou/articles/900188995.html',}, ], }, shopping: {header:'番組グッズ売れ筋ランキング',createdAt:'2026/04/23 00:00',items: [{title:'夫が寝たあとに みんなの短歌',subtitle:'オススメ',text:'',image:'https://shop.tv-asahi.co.jp/images/product/927706/001/927706_001_01.jpg',url:'https://shop.tv-asahi.co.jp/product/927706',}, {title:'タミ恋 文鳥さんマスコット',subtitle:'1位',text:'',image:'https://shop.tv-asahi.co.jp/data/image/product/scenario/000011/000011751/928107_001_01_vlfjP9AK.jpg',url:'https://shop.tv-asahi.co.jp/product/928107',}, {title:'宮舘涼太『タミ恋』時沢エータ アクリルスタンド',subtitle:'2位',text:'',image:'https://shop.tv-asahi.co.jp/data/image/product/scenario/000011/000011756/9J0122_001_01_XnhGxzpP.jpg',url:'https://shop.tv-asahi.co.jp/product/9J0122',}, {title:'宮舘涼太『タミ恋』時沢エータ ドラマコレクションカードセット',subtitle:'3位',text:'',image:'https://shop.tv-asahi.co.jp/data/image/product/scenario/000011/000011754/9J0120_001_01_BBSuCawQ.jpg',url:'https://shop.tv-asahi.co.jp/product/9J0120',}, ], }, }; 
  </script>

<noscript><iframe src="//www.googletagmanager.com/ns.html?id=GTM-P3HJF2" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript>
<script type="text/javascript" src="//www.tv-asahi.co.jp/mps/bigdata/luid/tvasahi-tools.js"></script>
<script type="text/javascript" src="//www.tv-asahi.co.jp/mps/bigdata/luid/ssl_tools.js"></script>
<script type="text/javascript" src="//www.tv-asahi.co.jp/mps/bigdata/luid/ssl_tools_f.js"></script>
<script type="text/javascript" src="//www.tv-asahi.co.jp/mps/bigdata/luid/optout.js"></script>
<script type="text/javascript" src="//www.tv-asahi.co.jp/mps/bigdata/luid/opt_init.js"></script>
<script type="text/javascript" src="//www.tv-asahi.co.jp/mps/bigdata/luid/optout_migration.js"></script>
<script type="text/javascript" src="//www.tv-asahi.co.jp/mps/bigdata/luid/get_luid.js"></script>
<script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
'//www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
})(window,document,'script','dataLayer','GTM-P3HJF2');</script>
</body>
</html>

sitemap.xml 200 OK

Type URL Set URLs 0 entries Valid XML No

URL Variants

www/non-www, trailing slash, HTTP→HTTPS

REVIEW

www/non-www, trailing slash, HTTP→HTTPS

Both www and non-www versions serve content

Got: Both variants return 200 Expected: One variant 301-redirects to the other

HTTP correctly 301-redirects to HTTPS

www / non-www

200https://www.tv-asahi.co.jp/

200https://tv-asahi.co.jp/

Inconsistent — duplicate content risk

HTTP → HTTPS

301http://tv-asahi.co.jp/ → https://www.tv-asahi.co.jp/

Consistent

HTTP Probe Timing

Total 1117 ms — DNS, TCP, TLS, TTFB, content transfer breakdown

REVIEW

DNS Lookup

224 ms

TCP Connect

223 ms

TLS Handshake

447 ms

Time to First Byte

1.12 s

Total Time

1.12 s

Connection waterfall

DNS Lookup 224 ms TCP Connect 223 ms TLS Handshake 447 ms Server Processing 223 ms Content Transfer 0 ms

TLS Certificate Expiry & Recommendations

241 days until leaf cert expires — 4 issues to address

REVIEW

Certificate validity

241

days left

0d 30d 60d 90d+

Recommended actions

Prefer TLS 1.3 — TLS 1.2 is acceptable but TLS 1.3 removes RSA key exchange and improves latency
Enable HSTS: Strict-Transport-Security: max-age=31536000; includeSubDomains
Enable DNSSEC on your domain for DNS spoofing protection
Enable OCSP stapling on your TLS server to remove a CA roundtrip and protect user privacy

DNS Records

1 A records, 517 ms lookup

PASS

1 A records, 517 ms lookup

Resolves to 1 IPv4 address(es)

Got: 52.192.163.53

Single A record — no DNS redundancy

Multiple A records provide failover if one server goes down.

No IPv6 (AAAA) records

3 nameserver(s) configured

Got: ns015-mhr66v8e2prh17i2.m.d-53.jp, ns015-mhr66v8e2prh17i2.m.d-53.net, ns015-mhr66v8e2prh17i2.m.d-53.info

1 mail exchanger(s) configured

CAA records not checked

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

SPF record present in TXT

DNS resolution is slow (517 ms)

Slow DNS adds latency to every page load. Consider a faster DNS provider.

Got: 517 ms

A	52.192.163.53
AAAA	—
CNAME	—
NS	ns015-mhr66v8e2prh17i2.m.d-53.jp, ns015-mhr66v8e2prh17i2.m.d-53.net, ns015-mhr66v8e2prh17i2.m.d-53.info
MX	10 tvasahi-co-jp0e.mail.protection.outlook.com
TXT	MS=ms79570325 apple-domain-verification=DngoZz8vvD9olqb2 adobe-idp-site-verification=f64a19ac-8a5b-4992-82d4-998c89cde809 SPF v=spf1 include:_spf2.tv-asahi.co.jp include:_spf1.tv-asahi.co.jp include:spf.pro...
CAA	Lookup not available with standard resolver

Resolved in 517 ms

Multiple A records provide failover if one server goes down.

Why this matters

Single A record means a single point of failure — if that IP goes down, your site is unreachable until DNS TTL expires.

Learn more ▾

Add multiple A records for round-robin failover, or use a managed DNS provider with health-checked failover (Route 53, Cloudflare, NS1). Short TTL (60-300s) lets clients recover faster on outages.

Source: SRE practice / DNS architecture

CAA record lookup requires a specialized DNS resolver. This check will be available in a future update.

Why this matters

Informational: CAA (Certification Authority Authorization) records weren't checked in this scan.

Slow DNS adds latency to every page load. Consider a faster DNS provider.

Why this matters

DNS resolution is slow — anycast DNS providers (Cloudflare, Route 53) typically resolve <50ms globally.

Source: DNS performance benchmarks

Domain Intelligence

Domain intelligence data not available

INFO

Domain intelligence data not available

RDAP and WHOIS lookup both failed

All checks on this page are automated. Results are estimates - run targeted manual reviews when the score affects a release decision.