She did not give any further details of her health status.
Then each was shown a "neutral" image of a casual acquaintance of the same sex and age as the former romantic partner for comparison purposes.
Watanabe, who has been in Christopher Nolan's Batman Begins and Inception, also starred in the reboot of Godzilla and Letters From Iwo Jima and lent his voice to the fourth installment of the Transformers franchise, Transformers: Age of Extinction.
Explaining his reluctance to talk about his illness previously, he said: 'As an actor, I didn't want to talk about it.
The imaging also showed that rejected lovers are trying to understand and learn from what happened, and the researchers conclude that falling out of love is a learning process.
"Romantic love evolved to start the mating process," Fisher tells Web MD."Attachment evolved to help you sustain this relationship." So what can the jilted do since there are no halfway houses for this addiction? "It needs to be taken more seriously." Her advice: "You've got to treat it as an addiction, and get rid of the cards and letters and don't call or write the person who jilted you.