Costa Rica: neutral country since 1949, after abolishing its military.
Finland (now EU): military doctrine of competent, “credible” independent defence, not depending on any outside support, and the desire to remain outside international conflicts. In 2006, Finland’s neutrality was brought into question by Prime Minister Matti Vanhanen during the inauguration of the Finnish EU presidency.
Ireland (now EU): a traditional policy of military neutrality defined as non-membership of mutual defence alliances.
Japan: constitutionally forbidden from participating in wars, but maintains heavily-armed self-defence forces and a military alliance. Constitution recently modified in the face of vigorous public opposition, to permit Japan to come to the aid of its ally or allies.
Liechtenstein: since its army was dissolved in 1868.
Panama: neutral country since 1989
Switzerland: self-imposed, permanent, and armed, designed to ensure external security. Switzerland is the second oldest neutral country in the world; it has not fought a foreign war since its neutrality was established by the Congress of Vienna in 1815.
Ukraine: Declared policy of state non-alignment in 2010.
Vatican City: the Lateran Treaty signed in 1929 with Italy imposed that “The Pope was pledged to perpetual neutrality in international relations and to abstention from mediation in a controversy unless specifically requested by all parties” thus making Vatican City neutral since then.