The extraordinary event took place in Mr Lomax's home when Osamu Komai came from Japan to apologise for the enormous suffering caused by his father, Captain Matsuo Komai, who was hanged as a war criminal after the Second World War.
Captain Komai, of the Imperial Japanese Army, was second in command at the camp where Mr Lomax was beaten to a pulp along with fellow prisoners discovered in possession of a radio. Captain Hawley and Lieutenant Armitage did not survive the brutal beatings and their bodies were dumped in a camp latrine.
After the war, it was Mr Lomax's evidence which helped condemn Komai so he found it hard to believe that the man's son wanted to apologise for his father's actions.
"I inquired very carefully whether Mr Osamu Komai was aware that I was probably responsible almost single handedly for his father's arrest, conviction and execution. I was assured that he knew," said Mr Lomax.
He was also told that the son's willingness to apologise for the sins of his father was an extraordinary gesture as the Japanese find it very hard to say sorry.
"Apparently it is the equivalent of offering me his soul," explained Mr Lomax.
He added: "There doesn't seem to be any precedent for a meeting of this kind."
The 88 year-old, who now lives in Berwick and is originally from Edinburgh, is now the only survivor of the Kanburi Radio Affair.
His harrowing experiences during the war are recorded in his book, The Railway Man, which became a best seller on its publication in 1995.
In it he tells of how he was captured in Singapore in February, 1942, while a second lieutenant with the Royal Signals. He, along with thousands of other allied PoWs, were sent to the Changi concentration camp and from there set to work on the notorious Burma Siam railway where the inhuman treatment meted out by the Japanese caused the deaths of thousands of prisoners and civilian Asian labourers.
Despite the malnutrition, illness and regular beatings, Lomax and others managed to build a radio in a bid to find out how the war was progressing with the hope of keeping up morale.
Lomax also created a detailed map of the surroundings which could be used in an escape attempt but this proved to be his downfall.
The radio was discovered on August 29, 1943, starting off a sequence of terrible repercussions which continue to this day.
Almost immediately two members of the radio group were arrested, beaten nearly to death then transferred into the hands of the Kempetai, the Japanese military police. On September 21, four further members of the group, including Lieut Lomax were arrested and again beaten to the point of death.
"We survived but only just — I myself had both my arms broken," said Mr Lomax.
Four days later a further four officers were similarly arrested and of those, Capt Hawley and Lieut Armitage were beaten to death with their bodies afterwards thrown into a camp latrine.
Because of the map, Lieut Lomax was subjected to a week of excruciating torture and although he survived, he suffered years of nightmares after the war, as well as intense flashbacks and an inability to relate properly to normal life.
Unsurprisingly he also nursed an intense hatred for the perpetrators of his ordeal, particularly the interpreter who interrogated him during his tortures.
Unknown to Mr Lomax, this man, Nagase Takashi, had suffered agonies of guilt after the war and had dedicated much of his life trying to make amends. The incredible story of the pair's eventual reconciliation is outlined in The Railway Man.
The pair are now firm friends and it was Takashi who found out that the son of Captain Komai wanted to meet Mr Lomax and apologise.
However although Mr Lomax was open to the meeting, his wife, Patti, was not convinced it was a good idea.
"I was worried about the meeting because of the emotions that could arise," she told the Advertiser this week.
Added Mr Lomax: "He looks very like his father and there is always a risk of resurrecting bad memories after something like that but I have got past most of them by writing the book."
Although Osama Komai was just a young boy when the war broke out the cruelty of his father had a terrible effect on the rest of his life.
"The whole family were treated as war criminals not offically but socially," explained Mr Lomax. "He must have suffered quite a lot. His father was responsible for a good deal of harm and he is no doubt about that but it is unfair that he gets the blame passed on to him."
Although now 70 years old, Osama managed to fly to Britain and travel to Berwick for the momentous meeting on Saturday.
"It was a painful journey for him and he was very quiet," said Mr Lomax. "I think he was very nervous and almost overcome by the experience. What his father did had become an obsession with him which had built up over 50 years."
Mr Lomax accepted the apology which was filmed for a Japanese documentary and the pair spent the afternoon talking through an interpreter.
"He was much happier by the end of the afternoon," said Mr Lomax.
He now intends to write to Mr Komai to keep the lines of communication open.
Said Mr Lomax: "Continuing to hate gets you nowhere. It just damages you as an individual. You have to put things in their place otherwise your whole life is dominated by hatefulness and you are the one to continue to suffer."
* His award-winning book, The Railway Man, is being reissued in November with a new cover.