Why sanitize_title function output urlencoded lang ja

I’m using Japanese lang WordPress

I’m adding this code single.php

<ul><?php
$terms = wp_get_post_terms( $post->ID , 'category', array('orderby' => 'ID'));
foreach($terms as $term){
	if(cat_is_ancestor_of(19, $term)){
		$html = '<li><a href="%1$s" title="%2$s">%3$s</a></li>';
		printf(	$html, esc_url(get_term_link($term, 'category')),sprintf( __( "タイトル %s" ), sanitize_title($term->name,'...')),				esc_html($term->name) );
	}
}?></ul>

Title attribute value is urlencoded when category name Japanese language

e.g category name ‘日本語’
result html code like this
<li><a href="https://www.odekake.biz/wp/?cat=140" title="%e6%97%a5%e6%9c%ac%e8%aa%9e">日本語</a></li></ul>
I expect the following outputs.
<li><a href="https://www.odekake.biz/wp/?cat=140" title="日本語">日本語</a></li></ul>

Is how to use this function wrong?

or

title="日本語" attribute value should not use multibite string?

Please let me know.