The words "κοναμι" and "ηανακο" are written in Greek on the the graves depicted in this card's OCG/TCG artwork. The first word is obviously "Konami" while the second word has no actual meaning in Greek.
Using a standard English keyboard with the Greek language selected, typing "konami" results in "κοναμι", while typing "hanako" results in "ηανακο". Hanako is a Japanese female name. It might be related to Hanako-san, a Japanese urban legend about the spirit of a young World War II-era girl who haunts school bathrooms.