2 alt attributes are empty or missing. Add alternative text so that search engines can better understand the content of your images.
Ratio : 6%
This page's ratio of text to HTML code is below 15 percent, this means that your website probably needs more text content. Search engines these days are smart enough to figure out if a page is on-topic and interesting enough to get higher rankings in their search results.
Try to write a good article around 1500 words and check for grammar and spelling errors. As they say in the SEO world: "Content is King."
Perfect, no Flash content has been detected on this page.
Great, there are no IFrames detected on this page.
Underscores in the URLs
Perfect! No underscores detected in your URLs.
We found a total of 0 links including 0 link(s) to files
Domain : nanouniverse.jp
Length : 15
Great, your website has a favicon.
We could not find a Print-Friendly CSS.
Good. Your declared language is ja.
Perfect. Your declared charset is UTF-8.
Errors : 1
Warnings : 0
Great! No email address has been found as plain text!
Great! We haven't found any deprecated HTML tags.
Excellent, your website doesn't use nested tables.
Perfect. No inline css has been found in HTML tags!