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<div class="alignleft"><h5>&laquo;
<a href="<?php echo get_permalink($adjacent_post->ID); ?>?lang=jp" title="<?php echo get_the_title($prevID); ?>">Previous</a>
</h5></div>

<?php $adjacent_postt = get_adjacent_post(true,'',true) ; ?>

<div class="alignright"><h5>
<a href="<?php echo get_permalink($adjacent_postt->ID); ?>?lang=jp" title="<?php echo get_the_title($nextID); ?>">Next</a>
</h5></div>