[u][b]East Asia[/b][/u]
The most prosperous region of the Far East before the Heavenfall, the East Asia region was home to several of the world's leading economic and manufacturing powers. The Heavenfall caused considerable destruction to the region, as many of its' major cities and settlements were in coastal regions or in areas heavily affected by natural disasters and other events, as well as being heavily populated and built up, causing further damage and loss of life, though with their economic and material wealth, the majority of these countries were able to rebuild quickly. 

[b]China[/b]
With the Sino-Soviet split, the USSR and China continued on their own separate paths during the remainder of the 20th and early 21st centuries. Throughout the 1990s China has pursued economic reforms and liberalisation, albeit at a slow pace, and still ranks low overall on worldwide rankings for democracy, religious freedoms and human rights, although is one of the major economic and military world powers, especially in the post heavenfall era. 
China survived the Heavenfall relatively intact; though of course not without damage as such a thing would be impossible. However, due to the efficiency and organisation of the government, military and emergency services, order was restored swiftly, along with reconstruction and disaster relief managed in a comparatively short time. 
The Chinese government after this offered and rendered assistance to other nations in their immediate region that had suffered. 
These actions lead to an overall increase in trust toward the Chinese nation and government, and a strengthening of alliances already in place. 
This regional softening of attitudes, as well as the destruction wrought on other nations did give an advantage to Chinese regional aspirations, and they were able to take over Taiwan with little notable resistance or interference from other national powers, despite previous treaty obligations or assurances. This did lead to a worsening of relations with the UN powers, and China withdrew from any intentions to join the N/UN as a result, though maintains cordial, if not friendly, diplomatic relations with them, and has repeatedly restated their lack of interest in territorial expansion or domination, though have assumed control of Macau and Hong Kong, and bought them into the greater nation of China, after rendering assistance there during the aftermath of the Heavenfall. These regions became governed by China, and are now part of the country, but existing passports and other held property, wealth, or assets remained in the hands of those who had them, and were still valid. 
What's left of the Spratly Islands following the geological upheavals in the region is still disputed territory. After the strengthening of relations between China and Vietnam, and Taiwan becoming part of the People's Republic of China, the majority of the Islands are held by nations friendly to China, with the remainder claimed by the Phillipines, a situation that has resulted in several skirmishes and even outright, if small scale, warfare that has threatened to drag the N/UN as a whole into the situation. This is not helped by accusations that pirate activity based in the Indonesian and Malaysian archipelagoes against Fillipino and western nations shipping has been sponsored by PRC and Vietnamese forces, in order to further destabilise the region and add credence to the claims by China that their full control of the Spratlys would allow for greater security. 

China has made friendly diplomatic relations with the NCAA, and have signed several mutually beneficial trade and other agreements. They have not made any formal military alliances yet, though have mutual training and trade agreements in place. 

[b]The Korean Peninsula[/b]
The Korean Peninsula has been a contentious hotspot of global politics since the Korean War in the 1950s. North Korea - or the Democratic People's Republic of Korea, to give the formal name - had attempted to improve the state of its' military technology and industrial capacity during the latter years of the 20th century, especially in the pursuit of nuclear weapons, and long range missiles especially. While the country maintained modestly good diplomatic relations with the USSR and People's Republic of China, neither country offered them much in the way of assistance when it came to their nuclear weapons programs, instead offering more in the way of economic, financial, and other aid packages, as well as training and advice for their military forces, and export of military equipment, albeit in a limited fashion. 
Even with this aid, the DPRK has remained behind the global curve for advancement and standards for health, living, freedoms, human rights and education and this seems entirely by design, due to the dictatorship in place, posing as a Communist or Socialist country, with even the few allies the country has restricting their aid and assistance. 

By comparison, South Korea has become a very liberal and modern country, with a lot of advanced manufacturing and industrial companies based there, as well as many other notable achievements, such as successful entertainment, tourism and other industries, and ranks well on most global comparisons for quality of life as a whole. 

When the Heavenfall struck, the extent of devastation in North Korea was unknown, due to the self-imposed blackout and isolation that the government persisted in. While South Korea was affected by earthquakes and tidal waves, as well as the subsequent and resulting flooding and other disasters, there was little indication of the state of their northern neighbour. Weeks passed, and it was only when satellite reconnaissance and overflights by reconnaissance aircraft at high altitudes were possible that the state of the country was confirmed. 
Numerous settlements and population centers had been devastated, and it seemed as though the population had been relocated en masse to around Pyongyang, the capital, and other such large and important cities. When reports finally started trickling in in the following months, it seemed as though the situation had grown even worse, with reports of extreme martial law, forced separation of families including parents and children, mass executions by the state, and even cannibalism. 
The situation being too extreme to be allowed to continue, and with the DPRK's military forces at an all-time low-level of capability and readiness, an invasion was launched by South Korea, along with forces from Australia, New Zealand, the USA and other allied countries, including Japan. There were a few surprises, the North Koreans had kept back a number of their most trained and well-supplied forces who put up a fight with their best equipment, and there were numerous concealed tunnels, bunkers, and other facilities that hindered advances. But overall, the war was over within months. China did not hinder the action, and in fact, provided support and intelligence to the allied forces, as well as aid to personnel shot down or off course, along with medical aid and relief. 
Since then, DPRK's ruling elite have been imprisoned and tried under crimes to humanity, and a relief effort has begun, with the DMZ being dismantled as the ROK's government slowly took control of reunification of the peninsula.

[b]Japan[/b]
Japan has been a steadfast ally of the Western nations, and a global economic power for the latter half of the 20th century, and into the 21st. 
The Heavenfall caused a large amount of destruction in the city, as it has long been vulnerable to seismic events, being on the Ring of Fire around the Pacific Ocean. However, the Japanese have long been building to resist and adapt to such disasters, and the efficiency and precision with which civil disasters are dealt with was to their credit, and many hundreds of thousands of lives were saved due to such quick action and resourceful engineering. 
In the aftermath of the Heavenfall and the dissolution of the Soviet government, remnant Soviet forces staged attacks and raids on Northern Japan, harassing shippping and attempting to seize resources using their firepower. This lead to several short, but intensive defensive actions by the JSDF. 
As a result, there was a popular public sentiment that the Japanese armed forces should strike at the bases used to stage these assaults, in order to protect national interests and public safety. 
This especially came to a head after bombing raids and missile attacks from former Soviet warships lead to the deaths of several hundred people, including children. Public protests were staged, and further to this, the Japanese government condemned their allies for not reacting in their agreed capacity to defend the country. 
As a direct result, Article 9 of the Japanese constituion was amended to allow for proactive operations to defend the country and it's national interests. This also lead to a period of rearmament and expansion of the Japanese Defence Forces. 
With the dissolution of the USSR and the effective collapse of the Russian State, the Japanese government launched an assault against the bases used to attack. Allied forces from South Korea, Australia, New Zealand, The Philippines, the USA, as well as other regional and international allies were also involved. Following this, the Japanese government established a permanent presence on Sakhalin island, delivering aid and relief to the people already living there, and beginning the process of transitioning Sakhalin into the sixth Japanese mainland island. 

[b]The Philippine Archipelago[/b]
[i]The Philippines Themselves will be the main focus of this section, and any other smaller nations of powers can be considered to be following their lead, or that of one of the other regional powers.[/i]

The Philippines struggled with corruption within the government during the later years of the 20th, and early 21st centuries, despite undergoing a great deal of change and transition from a mostly agricultural industry to one based more around service and manufacturing. The country as a whole began to modernise, and was considered a developing economy, until the Heavenfall hit.
Already being in a region vulnerable to earthquakes and seismic activity, as well as having a large concentration of the population in coastal regions, along with significant developed and built-up areas. 
The disaster caused great loss of life and infrastructure, and rebuilding was costly, and took a long time. 
During this time, the government struggled to reorganise and public faith and opinion in the government was at an all-time low, with the threat of revolution very real. 
In order to avoid this, the remaining members of parliament arranged and negotiated a coalition with an array of Non-Government Organisations (NGO's). The NGO's in question were a number of philanthropic, charitable, aid, assistance and human rights organisations, as well as a number of industrial and corporate concerns. 
Concern about this was raised by representative groups for the people, that it lacked any safeguarding or insurance for the common citizen to avoid or prevent the corruption that had previously been rife within the government. The church stepped in, acting as the representative for the 'common man' and as a mediating presence for human rights and well-being, and a 'conscience' of sorts. 
This has lead to a government that can be sometimes be slow to reach decisions due to the need for consensus and the debate that ensues, but the system has so far has remained much less beset by corruption and difficulty than in its' pre-Heavenfall incarnation. The involvement of NGO's and corporate interests has lead to a resurgent economy, along with the rebuilding and reconstruction allowing for the construction and implementation of more modern and technologically advanced industries, housing, transport, telecommunications and other such infrastructure along with investment into their military forces that have allowed them to assume a stronger position in regional politics and influence. 
Strong ties have been maintained with Japan, Korea, Australia and New Zealand, as well as internationally with the N/UN, which the Philippines are a member of.