Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
20th Anniversary—The Super Tour of Misia: Girls Just Wanna Have Fun
Table title:
Shows
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > Date </th><th colspan=1 rowspan=1 > City </th><th colspan=1 rowspan=1 > Country </th><th colspan=1 rowspan=1 > Venue </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > April 7, 2018 </td><td colspan=1 rowspan=2 > Osaka </td><td colspan=1 rowspan=4 > Japan </td><td class="highlighted"  colspan=1 rowspan=2 > Osaka-jō Hall </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > April 8, 2018 </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > April 27, 2018 </td><td class="highlighted"  colspan=1 rowspan=2 > Yokohama </td><td class="highlighted"  colspan=1 rowspan=2 > Yokohama Arena </td></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=1 > April 28, 2018 </td></tr>
</table>
Question:
Where and when did the 20th Anniversary—The Super Tour of Misia: Girls Just Wanna Have Fun start and end?
Answer:
The 20th Anniversary—The Super Tour of Misia: Girls Just Wanna Have Fun, comprised of four arena dates, began on April 7, 2018 at the Osaka-jō Hall in Osaka, and it concluded three weeks later on April 28, 2018, at Yokohama Arena in Yokohama.