What nonsense are you talking about? Japan has no armed forces at all, only self-defense forces. Japan has a fairly strong navy, but no nuclear weapons. Russia and Japan are countries from different weight categories militarily. Based on the limited military special operation in Ukraine, it is impossible to draw conclusions about the combat effectiveness and strength of the Russian army as a whole.
Japan nominally has no army. But their army is called the Japan Self-Defense Force. It's the same joke as Russia called the terrorist attack on Ukraine a "Special Military Operation"
But let's get back to Japan:
1. Japanese military policy is based on the following principles:
non-aggression
Non-use of nuclear weapons
Public control over the activities of the armed forces
Cooperation with the United States (cooperation means participation in joint exercises, the deployment of the US military contingent in Japan since 2010, the deployment of elements of the American missile defense system in Japan)
2. As of the beginning of 2011, the armed forces consisted of:
- 247,746 people
- reserve - 41.8 thousand people, not counting the coast guard and other paramilitary formations;
- mobilization resource was estimated at 29.2 million people
- ground forces: 151.6 thousand people, consisting of 5 army headquarters, 1 tank and 8 motorized infantry divisions, 15 brigades, 2 training regiments, 2 artillery groups, 4 air defense groups and a special operations group, armed with 100 tactical launchers missiles "type 88"; 850 main battle tanks (including 320 Type 90 and 517 Type 74); 70 infantry fighting vehicles; 100 combat reconnaissance vehicles; 780 armored personnel carriers; 210 self-propelled artillery guns; 470 pcs. 155 mm FH-70 howitzers; 100 MLRS; 1130 pcs. mortars of calibers 81, 107 and 120 mm; 690 ATGM launchers, 70 anti-aircraft artillery guns; 290 MANPADS; 12 LR-1 and LR-2 aircraft, as well as 430 army aviation helicopters (of which 185 are combat)
- air force: 47,123 people,
equipped with: 87 F2 aircraft; 202 F-15J and F-15DJ "Eagle"; 72 F-4EJ "Phantom-2"; 13 RF-4E and RF-4EJ; one Kawasaki EC-1; ten EC-2 "Hawkeye"; 4 Boeing-767 AWACS; 20 C-1; 10 C-130H; 11MU-2; 10 U-4; 20 U-125A; 10 U-125-800; 10T-3; 170T-4; 20 F-2B; 40T-7; 10 T-400; 10 YS-11E; 10 CH-47J helicopters; 12 KV-107 and 40 UH-60J
- naval forces: 45,518 people (of which 9.8 thousand serve in naval aviation), 16 submarines, 4 helicopter destroyers, 37 URO destroyers, 6 URO frigates, 12 landing craft, 6 landing hovercraft, 2 Uraga floating bases, 28 mine-sweeping ships, two oceanographic research vessels, 4 hydrographic vessels, 2 experimental vessels, 4 training ships, 2 training submarines, up to 60 auxiliary vessels and 20 tugs, as well as 179 aircraft and 139 naval aviation helicopters
- Coast Guard: 12,636 people, 45 large, 39 medium and 34 small patrol ships, more than 220 patrol boats, 13 hydrographic boats, 5 fire boats, 4 fire boats, up to 130 service and support vessels, 25 aircraft and 46 helicopters.
Moreover, Japan has military bases outside the country: in 2011, the first Japanese military base after the end of World War II was opened in Djibouti.
You can check the information in this source, in your native language
https://ru.wikipedia.org/wiki/%D0%A1%D0%B8%D0%BB%D1%8B_%D1%81%D0%B0%D0%BC%D0%BE%D0%BE%D0 %B1%D0%BE%D1%80%D0%BE%D0%BD%D1%8B_%D0%AF%D0%BF%D0%BE%D0%BD%D0%B8%D0%B8