The legacy of the war still haunts relations with China and the Republic of Korea (RoK), which suffered under Japan's sometimes brutal occupation and colonial rule before Tokyo's defeat in 1945.
China and the RoK have made clear they want Abe to stick to a landmark 1995 "heartfelt apology" by then-premier Tomiichi Murayama for suffering caused by Tokyo's "colonial rule and aggression".
Abe, seen by critics as a revisionist who wants to play down the dark side of Japan's wartime past, has said he will express "deep remorse" for the war and uphold past government statements, including Murayama's landmark remarks.
But he has also made clear he wants to applaud Japan's post-war peaceful record and outline its future role as an active player on the global stage.
Abe is leaning toward including key words from Murayama's Statement including "apology", "aggression" and "colonial rule", Japanese media have said.
But he may do so in an indirect way that attempts to satisfy a domestic conservative base fed up with what it considers as a humiliating cycle of apologies.
Abe also needs to satisfy ally Washington with remarks that do not inflame regional tension, and likely wants to keep up a thaw in ties with China, ahead of a possible visit to Beijing.
His junior coalition partner, the dovish Komeito party, similarly wants to avoid angering Asian neighbors.
Trying to meet such competing demands could result in what the Nikkei business daily called "an ambiguous mixed bag".
"Let's face it, the audience is the United States," said Andrew Horvat, visiting professor at Josai International University in Tokyo. "If not for the United States, I think Mr. Abe would be less careful in what he says."
Abe met US ambassador to Japan Caroline Kennedy on August 10.
Abe's statement comes as he pushes for a more robust defense policy through measures domestic critics say violate Japan's pacifist constitution. Public doubts about the bills have triggered a slide in Abe's ratings to below 40%.
The US has welcomed the changes, which Abe says are needed to meet new challenges, including a more assertive China.