This is a kind of customization, I have showed the created date.
Go to this File : templatesja_sugitehtmlcom_contentcategoryportfolio_item.php
Find this code:
<h2 class="article-title">
<?php if ($params->get('link_titles') && $params->get('access-view')) : ?>
<a href="<?php echo JRoute::_(ContentHelperRoute::getArticleRoute($this->item->slug, $this->item->catid)); ?>"> <?php echo $this->escape($this->item->title); ?></a>
<?php else : ?>
<?php echo $this->escape($this->item->title); ?>
<?php endif; ?>
</h2>
Add this code after the above code
<?php if ($params->get('show_create_date')) : ?>
<dl>
<dd class="create">
<i class="fa fa-clock-o"></i>
<?php echo JHtml::_('date', $this->item->created, JText::_('DATE_FORMAT_LC3')); ?>
</dd>
</dl>
<?php endif; ?>