Japanese tombstones, bohi (墓碑/ぼひ) are marked with the names of family members, with names written in black and red ink. The deceased members have their names marked in black, while those who are still living will have their names written in red. Writing someone’s name in red is inauspicious, fukitsu na (不吉な/ふきつな). Today this ties into business and social etiquette too, so make sure to trade your red pens for another color when traveling within Japan.